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The '''borders of Acadia''' have changed repeatedly throughout its history. More often than not, they were ignored, poorly defined, or confused with other boundaries. Acadia officially ceased to exist as a political entity in 1763.<ref>{{Harvtxt|Griffiths|2005|p=425}}</ref> Nevertheless, the Acadian people endured, and their territory continued to evolve, influencing—and still influencing—the definition of Acadia. This territory is partly associated with the Acadian diaspora.<ref>{{Harvtxt|Brasseaux|1987|p=1–10}}</ref> Some of Acadia’s former boundaries persist or have shaped modern borders, notably portions of the Canada–United States border.<ref name=":2">{{Harvtxt|Van Zandt|1976|p=12}}</ref> Uncertainties surrounding these historical borders continue to have consequences, including contributing to the Aroostook War.<ref name=":0">{{Harvtxt|Carroll|2001|p=197–220}}</ref>

== Evolution of Acadia’s borders == === Origins === Several Indigenous peoples successively occupied the territory that would become Acadia. The most recent before European contact were the Maliseet, Mi'kmaq, and Abenaki, whose cultures developed from the 6th century CE onward.<ref>{{Cite book |last=Reid |first=John G. |url=https://books.google.com/books?id=-hNKavYkuXQC |title=Essays on Northeastern North America, Seventeenth and Eighteenth Centuries |publisher=University of Toronto Press |year=2008 |isbn=978-0-8020-9137-6 |pages=23–25}}</ref> Martins Point is generally regarded as the boundary between Maliseet and Mi'kmaq territory, while Lepreau Point marked the divide between the Maliseet and the Passamaquoddy.<ref name="Nicholson_8-9">{{harvnb|Nicholson|1979|pp=8–9}}</ref> Portages connected these territories, and the peoples belonged to the Wabanaki Confederacy.<ref>{{Cite book |last=Prins |first=Harald E.L. |url=https://books.google.com/books?id=ek0rAQAAIAAJ |title=The Mi'kmaq: Resistance, Accommodation, and Cultural Survival |publisher=Wadsworth |year=1996 |isbn=978-0-15-501407-7 |pages=135–137}}</ref> In any case, these boundaries were fluid because the territories were not permanently occupied; the economy was based on hunting and fishing.<ref name="Nicholson_8-9" />

Indigenous boundaries had little or no impact on subsequent European borders.<ref name="Nicholson_8-9" /> However, the distribution of Indigenous nations was frequently shown on maps, and tribal names were sometimes used in place of territorial ones.<ref name="Ganong_164-174">{{harvnb|Ganong|1901|pp=164–174}}</ref>

=== Early European exploration === The Vikings reached North America around the year 1000 and named three regions—Helluland, Markland, and Vinland—whose exact locations and extents remain unknown.<ref name="Ganong_155-160">{{harvnb|Ganong|1901|pp=155–160}}</ref> In any event, none of their boundaries survived their departure.<ref name="Nicholson_9-12">{{harvnb|Nicholson|1979|pp=9–12}}</ref> <gallery class="center"> File:Skálholt-Karte.png|The 1570 Skálholt Map showing Viking possessions. File:Map-Erik le Rouge-fr.svg|Probable route of Viking explorers. </gallery> Several largely unsubstantiated theories exist about early pre-Columbian exploration and settlement of Acadia, including voyages by the Irish saint Saint Brendan around 530, the Welsh prince Madog around 1170, Malians in the 12th–13th centuries, the Knights Templar in the 14th century, the Zeno brothers around 1390, and the Chinese admiral Zheng He in 1421.<ref>{{Cite book |last=Quinn |first=David Beers |url=https://books.google.com/books?id=dReTAAAAIAAJ |title=North America from Earliest Discovery to First Settlements: The Norse Voyages to 1612 |publisher=Harper & Row |year=1977 |isbn=9780060134587 |pages=115–130}}</ref> Phantom islands and imaginary places such as Drogeo and Norumbega are associated with these voyages. Norumbega appeared on maps until the early 17th century; its last mention came in 1613 when Pierre Biard wrote that the St. Croix River flowed through it.<ref name="Ganong_164-174" />

In any case, Christopher Columbus reached the Americas in 1492. The papal bull ''Inter caetera'' (1493) granted Spain all lands west and south of a line 100 leagues ({{cvt|418|km}}) west of the Azores and Cape Verde.<ref name="Ganong_155-160" /> The Treaty of Tordesillas (1494) moved the line to 370 leagues ({{cvt|1770|km}}) west of Cape Verde.<ref name="Ganong_155-160" /> In both cases, the future Acadia fell within the Spanish sphere, but the demarcation was ignored by other European powers, including Spain and Portugal, and soon fell into disuse.<ref name="Nicholson_9-12" /> <gallery class="center"> File:Folio06r.jpg|The Treaty of Tordesillas. File:Spain and Portugal-fr.png|Demarcation line according to ''Inter caetera'' and Tordesillas (Spain west, Portugal east). </gallery> Many explorers visited the region in the 15th and early 16th centuries, including John Cabot for England in 1497 and João Álvares Fagundes for Portugal around 1520.<ref name="Nicholson_9-12" /> Fagundes explored and named several areas, including Newfoundland, present-day Nova Scotia, and Saint Pierre and Miquelon; he may have claimed them for Portugal, though this is unlikely.<ref>{{Cite book |last=Williamson |first=James A. |url=https://books.google.com/books?id=G1gqvwEACAAJ |title=The Cabot Voyages and Bristol Discovery Under Henry VII |publisher=Hakluyt Society |year=1962 |isbn=9780521010085 |pages=237–240}}</ref> Early explorers initially mistook the land for Asia but soon realized they had found a new continent and sought a passage to Asia.<ref name="Ganong_155-160" /> Maps of the period often used flags to denote possession, but boundaries remained vague.<ref name="Ganong_155-160" /> Exploration did not necessarily confer legal possession but formed the basis for future claims.<ref name="Ganong_155-160" /> European fishermen were already familiar with the coasts.<ref name="Nicholson_9-12" />

=== French Acadia (1604–1713) === French Acadia refers to the period from its founding in 1604 until its final conquest by Britain in 1713. It was not always called Acadia during this time, nor was it continuously under French sovereignty.<ref>{{Harvtxt|Griffiths|2005|p=3–5}}</ref>

==== Official status within the Kingdom of France ==== New France is sometimes considered to comprise only the Canada colony or to include Acadia as well.<ref name="Guerry_19">{{harvnb|Guerry|Basque|Couturier|2005|p=19}}</ref> In practice, however, Acadia remained distinct, with its own governor.<ref name="Guerry_19" /> Orders were supposed to pass through the Governor General of New France, but the French court sometimes dealt directly with Acadia’s governor.<ref name="Guerry_19" /> Relations between Acadia and Canada were often tense, characteristic of two separate colonies; even Placentia (Plaisance) refused cooperation.<ref name="Guerry_21">{{harvnb|Guerry|Basque|Couturier|2005|p=21}}</ref>

A spirit of independence animated both Acadia and Canada.<ref>{{harvnb|Guerry|Basque|Couturier|2005|p=22}}</ref> The Abenaki lived around the Penobscot River, forming a buffer zone between Acadia and New England.<ref name="Guerry_21" />

==== Recognition ==== Spanish and Portuguese presence prevented England and France from colonizing south of the 30th parallel north.<ref name="LL_13-16">{{harvnb|Landry|Lang|2001|pp=13–16}}</ref> The English focused around the 37th parallel and the French around the 45th, though the French were slow to establish settlements.<ref name="LL_13-16" />

The name “Acadia” was probably first used in 1524 by Giovanni da Verrazzano, exploring for France, to describe the Delmarva Peninsula; only in the 17th century did it refer to a region roughly corresponding to the modern Maritime provinces.<ref name="LL_13-16" /> <gallery class="center"> File:Wpdms verrazano voyage map 2.jpg|Verrazzano’s voyage. File:Delmarva.png|Delmarva Peninsula, the first region called Acadia. </gallery> France sent Jacques Cartier in 1534 before formally claiming the territory.<ref name="Ganong_155-160" /> Humphrey Gilbert took possession of Newfoundland (northeast of Acadia) for England in 1583, based on Cabot’s voyage.<ref name="Ganong_155-160" /> The Colony of Virginia was chartered the same year without defined limits.<ref name="Ganong_155-160" /> France then considered Acadia to include the Gulf of St. Lawrence coast extending southwest to an undetermined boundary with Virginia.<ref name="Ganong_155-160" />

In 1603, Henry IV of France, citing Verrazzano’s exploration, granted Pierre Dugua, Sieur de Mons a fur-trade monopoly and instructed him to found a colony between the 40th and 46th parallels—intended to run from Cape Cod to Cape Breton Island but actually bisecting the island.<ref name="Ganong_155-160" /> This ignored English explorations in Maine in 1602–1603.<ref name="Ganong_155-160" /> It was likely the first use of parallels as boundaries in Canadian history.<ref name="Nicholson_12-22">{{harvnb|Nicholson|1979|pp=12–22}}</ref> <gallery class="center"> File:Golfe Saint-Laurent Depths fr.svg|Gulf of St. Lawrence. File:Cartier First Voyage Map 1 fr.png|Jacques Cartier’s first voyage (1534). File:Newfoundland map blank.png|Newfoundland. File:Virginia in United States.svg|Modern Virginia. </gallery>

==== Early settlement attempts ==== Aymar de Chaste received the New France trade monopoly in 1603 and sent François Gravé du Pont and Samuel de Champlain, but no settlement was founded.<ref name="LL_17-24">{{harvnb|Landry|Lang|2001|pp=17–24}}</ref>

Acadia was founded in 1604 by Pierre Dugua de Mons on Sainte-Croix Island, now in Maine near the northern shore of the Bay of Fundy.<ref name="LL_13-16" /> An earlier colony on Sable Island (1598–1603) had failed.<ref name="LL_17-24" /> Acadia became one of the first regions in North America to be accurately mapped, by Champlain in 1604.<ref>{{Harvtxt|Daigle|1993|p=94}}</ref> The Sainte-Croix settlement failed, and Port-Royal was established in 1605 on the southern shore of the Bay of Fundy.<ref>{{Harvtxt|Griffiths|2005|p=21–35}}</ref> <gallery class="center"> File:Acadia 1604-1607 topographic map-fr.svg|Acadia 1604–1607, showing Champlain’s and Dugua’s expeditions. File:Acadia 1610-1613 topographic map-fr.svg|Acadia 1610–1613, showing settlements and Indigenous nations. </gallery>

==== Beginning of hostilities ==== thumb|upright=0.5|Borders (green) of the Plymouth Council for New England. From the outset, England coveted Acadia’s strategic position and repeatedly attacked it.<ref>{{harvnb|Guerry|Basque|Couturier|2005|p=16}}</ref> Most English attacks aimed to push Acadia’s border eastward to the Kennebec River and then the Penobscot River.<ref name="Guerry_18">{{harvnb|Guerry|Basque|Couturier|2005|p=18}}</ref> The French mainly tried to disrupt Boston.<ref name="Guerry_18" /> The French founded no permanent settlements west of the St. Croix River.<ref>{{harvnb|Van Zandt|1976|pp=55–60}}</ref> Most attacks failed or were abandoned due to poor organization or weather.<ref name="Guerry_18" /> Governors frequently moved the capital and received little military or financial support, contributing to instability.<ref name="LL_33-34">{{harvnb|Landry|Lang|2001|pp=33–34}}</ref>

In 1606, the Virginia Company received a charter from James I for Virginia between the 34th and 45th parallels, ignoring Acadia’s boundaries.<ref name="Nicholson_12-22" /> The English founded the short-lived Popham Colony in Maine in 1607.<ref>{{harvnb|Van Zandt|1976|pp=55–60}}</ref> When the French settled Mount Desert Island in 1613, the English destroyed it and captured Port-Royal, basing their claim on Cabot’s voyage.<ref name="LL_25">{{harvnb|Landry|Lang|2001|p=25}}</ref>

In 1620, James I replaced the Virginia Company with the Plymouth Council for New England, granting land from the Atlantic to the Pacific between the 40th and 48th parallels—encompassing Acadia and the nascent Canada colony.<ref>{{harvnb|Van Zandt|1976|pp=55–60}}</ref> The modern 49th parallel border is coincidental.<ref name="Ganong_164-174" />

==== Nova Scotia for the first time (1621–1632) ==== {{Main|Nova Scotia}} From 1613, Scotland claimed a colony called Nova Scotia, roughly covering French Acadia east of the St. Croix River and a line drawn due north.<ref name="Nicholson_12-22" /> In 1621, James VI and I granted it to his favorite Sir William Alexander.<ref name="Nicholson_12-22" /> Part of the present Canada–US border derives from this grant.<ref name="Ganong_164-174" /> It was the first North American territory delimited by precise, identifiable geographical features.<ref name="Nicholson_12-22" />

Later in 1621, the Plymouth Council granted Alexander the “territory of Sagadahock” between the St. Croix and Kennebec rivers.<ref>{{harvnb|Van Zandt|1976|pp=55–60}}</ref> In 1622, John Mason and Ferdinando Gorges received land between the Kennebec and Merrimack, named the Province of Maine; it was split in 1629 into Maine and New Hampshire.<ref>{{harvnb|Van Zandt|1976|pp=55–60}}</ref>

In 1627, the Company of One Hundred Associates received a monopoly over New France, defined as stretching from Newfoundland to the Great Lakes, the Arctic Circle to Florida—thus including Acadia and English possessions.<ref name="Nicholson_12-22" /> War broke out that year between France and England. The Treaty of Saint-Germain-en-Laye (1632) partially ended it and returned Acadia to France.<ref name="Nicholson_12-22" />

The Nova Scotia grant was reconfirmed in 1625 and 1633.<ref name="Ganong_164-174" /> The colony was divided into New Alexandria (north) and New Caledonia (south) across the Isthmus of Chignecto and Bay of Fundy—resembling modern New Brunswick and Nova Scotia without direct connection.<ref name="Ganong_164-174" /> Scottish settlers arrived in 1629 at Cape Breton and Port-Royal.<ref name="Nicholson_12-22" />

Meanwhile, Canada was briefly granted to Alexander in 1628; the grant lapsed after 1632.<ref name="Ganong_164-174" /> Charles de Saint-Étienne de La Tour received a baronetcy in 1630 from Cape Fourchu (near Yarmouth) to Mirliguèche (near Lunenburg), implying this was the sole “Acadia”.<ref name="Ganong_174-185">{{harvnb|Ganong|1901|pp=174–185}}</ref> <gallery class="center"> File:William Alexander, 1st Earl of Stirling - Project Gutenberg etext 20110.jpg|Sir William Alexander. File:Stcroixrivermapmaine-fr.png|St. Croix River with modern borders. </gallery>

=== British Acadia (1713–1763) === British Acadia describes the region of Acadia under British control from 1713 to 1763.<ref>{{Cite book |last=Reid |first=John G. |url=https://books.google.com/books?id=5f4UAAAAYAAJ |title=Acadia, Maine, and New Scotland: Marginal Colonies in the Seventeenth Century |publisher=University of Toronto Press |year=1981 |isbn=978-0-8020-5507-1 |pages=190–195}}</ref>

==== Treaty of Utrecht and its interpretation (1713) ==== thumb|The Treaty of Utrecht. The British conquest of Acadia was formalized by the Treaty of Utrecht in 1713.<ref name=":3">{{Cite book |last=Plank |first=Geoffrey |url=https://books.google.com/books?id=ZoVaDwAAQBAJ |title=An Unsettled Conquest: The British Campaign Against the Peoples of Acadia |publisher=University of Pennsylvania Press |year=2001 |isbn=9780812207101 |pages=39–44}}</ref><blockquote class="templatequote"><p>The Most Christian King shall restore to the Queen of Great Britain, on the day of the exchange of the ratifications of this present Treaty of Peace, letters and authentic acts, which shall serve as evidence of the cession, in perpetuity, to the Queen and to the Crown of Great Britain, of the island of Saint Christopher, which shall henceforth be possessed alone by British subjects; of Nova Scotia, or Acadia, in its entirety, according to its ancient limits, as also of the town of Port Royal, now called Annapolis Royal; and generally of all that depends on the said lands and islands of the said country, with the sovereignty [...].<ref name=":3"/></p></blockquote>

In practice, France retained Île Royale and Île Saint-Jean, along with other holdings such as Anticosti Island and fishing rights on the French Shore of Newfoundland.<ref group="note">These latter two territories were not originally part of Acadia but became associated with it later. The French had held the colony of Placentia in Newfoundland since 1660.</ref><ref name="Nicholson_12-22" /> The treaty equated Acadia with Nova Scotia, despite France's longstanding claim that the colony extended to the Kennebec River or at least the Penobscot River.<ref name="Ganong_153-154">{{harvnb|Ganong|1901|pp=153–154}}</ref> From the perspective of Massachusetts, the treaty restored the territory of Sagadahock and Nova Scotia, while Nova Scotia's new governor viewed the colony as encompassing all of former Acadia with its western boundary at the St. George River.<ref name="Ganong_153-154" /> Great Britain regarded Acadia (and thus Nova Scotia) as extending north to the St. Lawrence River.<ref name="Ganong_153-154" /> France, however, limited Acadia (and Nova Scotia) to the southern portion of the peninsula,<ref name="Ganong_153-154" /> arguing that it was not the pre-1710 Acadia but a different one "according to its ancient limits."<ref name="Ganong_197">{{harvnb|Ganong|1901|p=197}}</ref> These divergent views of Acadia were reflected in maps produced by both powers.<ref name="Ganong_153-154" /> The British did not immediately occupy the continental portion of the territory after the treaty's signing, implying continued French sovereignty there.<ref name="Ganong_153-154" />

<gallery> File:Ile du Cap-Breton.png|Île Royale, now Cape Breton Island. File:Carte IPE.png|Île Saint-Jean, now Prince Edward Island. File:Terre-Neuve.png|The French Shore of Newfoundland, 1713–1904. File:Anticosti.jpeg|Anticosti Island. </gallery> The French began claiming the continental portion around 1720.<ref name="Ganong_197" /> In 1751, they built Fort Beauséjour on the north bank of the Missaguash River, while the British constructed Fort Lawrence on the south bank, effectively recognizing the French position ''de facto''; this marked the third time the Isthmus of Chignecto served as a boundary.<ref name="Ganong_153-154" />

Despite boundary uncertainties, the English granted the township of Harrington along the Saint John River in 1732, though the grant was soon forgotten.<ref name="Ganong_225-227">{{harvnb|Ganong|1901|pp=225–227}}</ref>

==== Treaty of Aix-la-Chapelle and boundary commission (1748–1755) ==== In 1748, the Treaty of Aix-la-Chapelle (1748) effected no changes to the respective positions.<ref name="Ganong_153-154" /> The treaty provided for a bilateral commission in 1750 to delimit Acadia's boundaries, which yielded no results and was dissolved. Nonetheless, the commission's conferences and published volumes preserved many lost or rare documents.<ref name="Ganong_198">{{harvnb|Ganong|1901|p=198}}</ref>

The boundary between Massachusetts and Nova Scotia remained practically undefined; Massachusetts proposed several solutions to Nova Scotia, which deferred the matter to the Crown.<ref name="Ganong_153-154" /> In 1762, the two colonies agreed not to grant lands in the undefined area until the boundary was clarified.<ref name="Ganong_153-154" />

A bilateral commission was also established to delimit the boundary at the Isthmus of Chignecto, but it too failed.<ref name="Daigle_37">{{Harvtxt|Daigle|1993|p=37}}</ref> The Acadians were deported between 1755 and 1763, but one-third had returned by the end of the 18th century.<ref name="Trepanier">{{Cite journal |last=Trépanier |first=Pierre |year=1996 |title=Les Acadiens du Québec |trans-title=The Acadians of Quebec |url=https://books.google.com/books?id=2dVKAAAAYAAJ |journal=Revue d'histoire de l'Amérique française |language=fr |volume=50 |issue=1 |pages=5–32 |doi=10.7202/000440co |doi-broken-date=29 December 2025 }}</ref> The English forced returning Acadians to settle in small, dispersed groups; most former Acadian lands were granted to English settlers.<ref name="Trepanier" />

=== Expulsion of the Acadians (1755–1763) === {{Main|Expulsion of the Acadians}}

=== Partition of Acadia === In 1763, France ceded its North American possessions to Great Britain via the Treaty of Paris (1763), which was unambiguous and ended disputes over Acadia's boundaries.<ref name="Ganong_220-222">{{harvnb|Ganong|1901|pp=220–222}}</ref> The only territory France gained was Saint Pierre and Miquelon, intended as a refuge for its fishermen.<ref group="note">Saint Pierre and Miquelon was not originally part of Acadia but became associated with it later.</ref><ref name="Nicholson_12-22" /><ref>{{Harvtxt|Plank|2001|p=149–160}}</ref> <gallery class="center"> File:Acadie 1754.png|Acadia's boundaries in 1754. File:Saint-Pierre and Miquelon EEZ map-fr.svg|Current boundaries of Saint Pierre and Miquelon. </gallery> The St. Croix River and a line due north formed Nova Scotia's new boundary—the same as that of William Alexander's Nova Scotia in 1621.<ref name="Ganong_153-154" /> The territory of Sagadahock thus defaulted to Massachusetts possession.<ref name="Ganong_153-154" />

All internal French-era boundaries in Acadia were dissolved.<ref name="Ganong_225-227" /> Newfoundland was granted all coastline from the Saguenay River in the west to Hudson Strait in the north, including islands such as Anticosti and the Magdalen Islands.<ref name="Nicholson_12-22" /> Île Royale and Île Saint-Jean were annexed to Nova Scotia; Governor Montague Wilmot's commission defined their boundaries.<ref name="Nicholson_12-22" /> By expanding Nova Scotia, the British aimed to consolidate their presence and assert authority over continental Acadian territories claimed since the Treaty of Utrecht.<ref name="Nicholson_12-22" />

The Province of Quebec, replacing Canada, was created later in 1763.<ref name="Nicholson_12-22" /> Its southern boundary ran along the 45th parallel north, then north along the highlands (the Appalachian Mountains) dividing the St. Lawrence River watershed from that of the Atlantic Ocean, and finally east along the north shore of the Chaleur Bay to Cap des Rosiers.<ref name="Nicholson_12-22" /> This deprived Quebec of the Gaspé Peninsula.<ref group="note">The exact definition of Canada, like that of Acadia, was uncertain. Strategic considerations prompted the British to reduce the colony's size.</ref><ref name="Ganong_223-225">{{harvnb|Ganong|1901|pp=223–225}}</ref> The Quebec Act of 1774 confirmed this boundary but granted other lands, including those ceded to Newfoundland in 1763.<ref name="Nicholson_22-27">{{harvnb|Nicholson|1979|pp=22–27}}</ref> Unrest in the Thirteen Colonies prompted British expansion of Quebec's territory, but this decision contributed to the American Revolution.<ref name="Nicholson_22-27" /> The texts overlooked that the "highlands" do not approach Chaleur Bay in this manner and ignored the Restigouche River, which flows into the bay rather than the St. Lawrence or Atlantic, leaving part of the boundary undefined.<ref name="Ganong_220-222" /> Contemporary maps depicted the Restigouche farther north and shorter than in reality, explaining the confusion.<ref name="Ganong_220-222" /> Most cartographers resolved this by drawing a straight line east from the highlands to the Restigouche's mouth, while Des Barres' more accurate map diverted the boundary around the river's source and then followed the shortest path to Chaleur Bay.<ref name="Ganong_220-222" /> In any case, Quebec's southern boundary automatically became the northern boundary of Massachusetts and Nova Scotia.<ref name="Ganong_223-225" /> <gallery class="center"> File:Province of Quebec 1774.gif|Quebec's boundaries in 1774. File:ChaleurBay23.jpg|Satellite view of Chaleur Bay and Gaspé Peninsula. </gallery> Massachusetts continued claiming the territory of Sagadahock (lands east to the St. Croix River), while Nova Scotia claimed lands west to the Penobscot River as heir to Acadia.<ref name="Ganong_223-225" /> However, the Treaty of Paris and Quebec Act transferred northern Sagadahock to Quebec.<ref name="Ganong_223-225" /> Governor Wilmot's 1763 commission held that Nova Scotia's western boundary ran from Cape Sable through the Bay of Fundy to the St. Croix's mouth, then due north to Quebec's southern boundary.<ref name="Ganong_223-225" /> This created a "north angle," frequently mentioned thereafter.<ref name="Ganong_223-225" /> Notably, the commission stated Nova Scotia once extended to the Penobscot, a phrasing that avoided finality amid ongoing boundary disputes.<ref name="Ganong_223-225" />

Nova Scotia had been divided into counties in 1759, with all territory north of Kings County, Nova Scotia—including present-day New Brunswick—falling within Cumberland County, Nova Scotia.<ref name="Ganong_225-227" /> The Saint John River valley was separated from Cumberland in 1765 to form Sunbury County.<ref name="Ganong_225-227" /> A boundary between the counties was established in 1770.<ref name="Ganong_225-227" /> Sunbury's western boundary was described as running due north from the St. Croix's source to the Saint John River, then to Quebec's southern boundary.<ref name="Ganong_225-227" /> This overlapped part of present-day Maine, as reaching Quebec from the Saint John required veering far west near the Chaudière River's source.<ref name="Ganong_225-227" /> <gallery class="center"> File:CumberlandCounty.png|Modern Cumberland County. File:Map of New Brunswick highlighting Sunbury County.png|Modern Sunbury County. File:St John River Map-fr.png|Saint John River. File:CarteRiviereChaudiere.png|Chaudière River. </gallery> Île Saint-Jean was nearly depopulated in 1758 during the Expulsion of the Acadians before being surveyed in 1764 and granted to various English lords in 1767.<ref name="Nicholson_22-27" /> At their request, the island was separated from Nova Scotia in 1769 and renamed Prince Edward Island in 1798.<ref name="Nicholson_22-27" /> New Brunswick was separated from Nova Scotia in 1784.<ref name="LL_132-133">{{harvnb|Landry|Lang|2001|pp=132–133}}</ref> Île Royale, renamed Cape Breton Island, became a separate province in 1784 but was rejoined to Nova Scotia in 1820.<ref>{{Cite book |last=Reid |first=John G. |url=https://books.google.com/books?id=xcoRAQAAIAAJ |title=Six Crucial Decades: Times of Change in the History of the Maritimes |publisher=Nimbus Publishing |year=1987 |isbn=978-0-920852-89-7 |pages=45–50}}</ref>

=== Summary ===

==== Acadia ==== {| class="wikitable" |- ! Name<ref name="Nicholson_12-22" /> !! Duration !! Sovereignty !! Origin |- | Acadia || 1604–1620 (1632 for the French) || {{flag|Kingdom of France}} (1328–1792) || Explorations of Giovanni da Verrazzano (1524) |- | New England || 1620–1621 || {{flag|Kingdom of England}} || Grant of the Plymouth Council for New England |- | Nova Scotia || 1621–1632 || {{flag|Kingdom of Scotland}} || Grant to William Alexander |- | Acadia || 1632–1654 (1664 for the French) || {{flag|Kingdom of France}} (1328–1792) || Treaty of Saint-Germain-en-Laye (1632) |- | Nova Scotia || 1654–1667 || {{flag|Commonwealth of England}}, {{flag|Kingdom of England}} || Invasion by Robert Sedgwick, Treaty of Westminster (1654) |- | Acadia || 1667–1674 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Breda (1667) |- | New Holland || 1674–1678 || {{flag|Dutch Republic}} || Invasion by Jurriaen Aernoutsz |- | Acadia || 1678–1691 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Nijmegen |- | Massachusetts || 1691–1696 || {{flag|Kingdom of England}} || Invasion by William Phips |- | Nova Scotia || 1696–1697 || {{flag|Kingdom of England}} || Separation from Massachusetts |- | Acadia || 1697–1713 (1763 according to France) || {{flag|Kingdom of France}} (1328–1792) || Treaty of Ryswick |- | Nova Scotia || 1713–present || {{flag|Kingdom of Great Britain}} || Treaty of Utrecht |}

==== Territory of Sagadahock ==== {| class="wikitable" |- ! Name<ref name="Ganong_153-154" /> !! Duration !! Sovereignty !! Origin |- | Territory of Sagadahock || 1664–1667 || {{flag|Kingdom of England}} || Grant by Charles II to the Duke of York |- | Acadia || 1667–1674 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Breda (1667) |- | Territory of Sagadahock || 1674–1678 || {{flag|Kingdom of England}} || Restoration of grant to the Duke of York |- | Acadia || 1678–1691 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Nijmegen |- | Massachusetts || 1690–1691 || {{flag|Kingdom of England}} || Invasion by William Phips |- | Nova Scotia || 1691–1696 || {{flag|Kingdom of England}} || Separation from Massachusetts |- | Acadia || 1696–1713 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Ryswick |- | Territory of Sagadahock || 1713–1763 || {{flag|Kingdom of England}} || Treaty of Utrecht |- | Massachusetts || 1763–present || {{flag|Kingdom of England}} || Treaty of Paris (1763) |}

==== Partition of Acadia ==== {| class="wikitable" |- ! Name !! Duration !! Sovereignty !! Origin !! Portion |- | Île Royale || 1713–1763 || {{flag|Kingdom of France}} (1328–1792) || Treaty of Utrecht|| Gulf of St. Lawrence islands |- | {{flagicon|Canada}} Nova Scotia || Since 1713 || {{flag|United Kingdom}} then {{flag|Canada}} || Treaty of Utrecht|| Peninsular portion and later Île Royale/Cape Breton Island |- | Territory of Sagadahock || 1713–1763 || {{flag|United Kingdom}} || Treaty of Utrecht|| Portion west of St. Croix River |- | {{flagicon|United States}} Massachusetts || 1763–1820 || {{flag|United Kingdom}} then {{flag|United States}} || Treaty of Paris (1763) || Territory of Sagadahock |- | {{flagicon|Canada}} Prince Edward Island || Since 1769 || {{flag|United Kingdom}} then {{flag|Canada}} || || Former Île Saint-Jean |- | Province of Quebec || 1774–1791 || {{flag|United Kingdom}} || Quebec Act || Gaspé, Magdalen Islands, north of Sagadahock territory |- | {{flagicon|Canada}} New Brunswick || Since 1784 || {{flag|United Kingdom}} then {{flag|Canada}} || || Continental portion east of St. Croix River and south of Chaleur Bay |- | Cape Breton Island || 1784–1820 || {{flag|United Kingdom}} || || Former Île Royale |- | Lower Canada || 1791–1841 || {{flag|United Kingdom}} || Constitutional Act 1791 || Gaspé, Magdalen Islands, north of Sagadahock territory |- | {{flagicon|United States}} Maine || Since 1820 || {{flag|United States}} || Missouri Compromise || Territory of Sagadahock |- | {{flagicon|Canada}} Canada (Province of Canada) || 1841–1867 || {{flag|United Kingdom}} || Act of Union 1840 || Gaspé, Magdalen Islands, north of Sagadahock territory |- | {{flagicon|Canada}} Quebec || Since 1867 || {{flag|Canada}} || British North America Acts || Gaspé, Magdalen Islands, north of Sagadahock territory |}

== Distribution of the Acadian population == The distribution of the Acadian population has not always been tied to borders but has influenced their definition.<ref name="Griffiths2005">{{Harvtxt|Griffiths|2005|p=3}}</ref>

=== French Acadia === Many colonization projects had to be canceled or delayed, due in part to shortages of supplies and funds; even observers, until the early 18th century, spoke of Acadia as a place to be colonized.<ref name="Guerry_20">{{harvnb|Guerry|Basque|Couturier|2005|p=20}}</ref> The colonization of Acadia truly began under the impetus of Isaac de Razilly in 1632.<ref name="LL_38-42">{{harvnb|Landry|Lang|2001|pp=38–42}}</ref> Settlement started at Port-Royal and expanded to Beaubassin in 1671, the Mines in 1682, and subsequently to Pisiquid and the Trois-Rivières.<ref name="LL_38-42" /> The rest of the territory remained sparsely populated.<ref name="LL_38-42" />

=== British Acadia === In 1755, the governor of Nova Scotia, Charles Lawrence, captured Fort Beauséjour from the French and began the Expulsion of the Acadians.<ref name="LL_82">{{harvnb|Landry|Lang|2001|p=82}}</ref> Until 1763, the territories adjacent to Nova Scotia were annexed, and Acadians were deported to New England.<ref name="LL_89">{{harvnb|Landry|Lang|2001|p=89}}</ref> Many others managed to flee to Canada, Île Saint-Jean (present-day Prince Edward Island), or hide among the Indigenous peoples.<ref name="LL_89" /> Several colonies refused these prisoners, who were then deported to England or returned to Nova Scotia.<ref name="LL_92">{{harvnb|Landry|Lang|2001|p=92}}</ref> Île Saint-Jean was nearly depopulated in 1758. Two-thirds were deported to France, while others sought refuge at Ristigouche or Quebec.<ref name="LL_129">{{harvnb|Landry|Lang|2001|p=129}}</ref> Refugees in England were expatriated to France in 1763.<ref name="LL_96">{{harvnb|Landry|Lang|2001|p=96}}</ref> Some Acadians sought refuge in Saint Pierre and Miquelon but were almost all deported in 1778.<ref name="Nicholson_22-27">{{harvnb|Nicholson|1979|pp=22–27}}</ref>

=== Since 1763 === After the Expulsion of the Acadians, Acadia transitioned from a defined territory to a set of communities with fluid borders.<ref name="Massicotte_81-85">{{harvnb|Massicotte|Pâquet|Savard|2007|pp=81–85}}</ref>

After the signing of the Treaty of Paris (1763) in 1763, Acadians moved to the West Indies, France, Louisiana, and Quebec, but mostly to Nova Scotia.<ref name="LL_128">{{harvnb|Landry|Lang|2001|p=128}}</ref> About 12,000 New England Planters had already settled in former Acadian villages, and the law prohibited Acadians from forming large communities.<ref name="LL_128" /> They could settle on reserved lands among Anglophones or found new villages in remote corners of former Acadia, such as Cape Breton Island, Prince Edward Island, or the territory that became New Brunswick in 1784—which most did.<ref name="LL_128" /> Among all the former core Acadian villages, only Pobomcoup, the left bank of the Trois-Rivières,<ref name="LL_128" /> and Beaubassin (though the latter hosted few Acadians) were not reserved for Anglophones. Exiles gradually settled in Halifax and along the Strait of Canso, then from 1767 in Baie-Saint-Marie, Tusket, and Pobomcoup, and from 1780 in Chéticamp and Margaree.<ref name="LL_128" />

Nearly two-thirds of the Acadians in France went to Louisiana in 1785.<ref name="LL_97">{{harvnb|Landry|Lang|2001|p=97}}</ref> Their descendants are now called Cajuns.<ref>{{Harvtxt|Brasseaux|1987|p=108}}</ref>

A group of Acadians from Saint-Malo settled in the Falkland Islands in 1764. Most left the archipelago in the following years, but it seems some families left descendants on these islands as well as in Montevideo, Uruguay.<ref>{{Cite web |author=Leclerc |first=Jacques |title=L'aménagement linguistique dans le monde - Îles Malouines |trans-title=Language Planning in the World - Falkland Islands |url=http://www.axl.cefan.ulaval.ca/amsudant/falkland.htm |url-status=dead |archive-url=https://web.archive.org/web/20130611211815/https://www.axl.cefan.ulaval.ca/amsudant/falkland.htm |archive-date=June 11, 2013 |access-date=November 22, 2025 |website=Centre international de recherche sur le bilinguisme |language=fr}}</ref>

From 1785, the Madawaska region saw the arrival of Acadians who had to leave the lower Saint John River valley to the United Empire Loyalists.<ref name="LL_129">{{harvnb|Landry|Lang|2001|p=129}}</ref> By the end of the 18th century, 36% of Acadians were settled in the Maritime provinces, and their return from exile continued until the 1820s.<ref name="LL_128" /> Until the second half of the 20th century, Maritime settlements expanded along the coasts and into the hinterland.<ref name="LL_129" /> Several factors contributed to population movements, but the most consistent was religious presence. Thus, the construction of a chapel or the establishment of a priest generally meant a community was permanently settled.<ref name="Arsenault_114">{{Cite book |last=Arsenault |first=Samuel P. |title=L'Acadie des Maritimes |publisher=Centre d'études acadiennes, Université de Moncton |year=1980 |isbn=2-921166-06-2 |editor=Daigle |editor-first=Jean |location=Moncton |pages=114 |language=fr |trans-title=Acadia in the Maritimes |chapter=La Géographie et les Acadiens |trans-chapter=The Geography and the Acadians}}</ref> During this period, the arrival of numerous British immigrants accentuated the minority status of Acadians.<ref name="LL_127">{{harvnb|Landry|Lang|2001|p=127}}</ref>

In the 19th century, French fishing families and residents of Saint Pierre and Miquelon settled on the French Shore of Newfoundland, particularly in the Port au Port Peninsula, despite the prohibition of permanent settlements.<ref name="FCFA">{{Cite book |last=Fédération des communautés francophones et acadienne du Canada|url=https://www.francotnl.ca/FichiersUpload/Documents/20090957Profils_terre_neuve_et_labrador_fr.pdf|title=Profil de la communauté francophone de Terre-Neuve-et-Labrador|year=2009|isbn=978-2-922742-35-0|location=Ottawa|pages=17|language=fr|trans-title=Profile of the Francophone Community of Newfoundland and Labrador|access-date=November 22, 2025|archive-url=https://web.archive.org/web/20170403093445/https://www.francotnl.ca/FichiersUpload/Documents/20090957Profils_terre_neuve_et_labrador_fr.pdf|archive-date=April 3, 2017|url-status=live|publisher=La Fédération des communautés francophones et acadienne du Canada}}</ref> They were joined by Acadian farmers.<ref name="FCFA" /> The Francophone population then underwent massive cultural assimilation. France lost its fishing rights in 1904.<ref name="FCFA" />

In the second half of the 20th century, Acadian communities formed in Alberta and the Labrador.<ref name=":4">{{Cite book |last=Daigle |first=Jean |url=https://www.erudit.org/en/books/culture-francaise-damerique/identite-cultures-nationales-lamerique-francaise-en-mutation/000440co/?utm_source=chatgpt.com |title=Identité et cultures nationales. L'Amérique française en mutation |publisher=Les Presses de l’Université Laval |year=1995 |isbn=2-7637-7424-5 |language=fr |trans-title=Identity and national cultures. French America in transition |chapter=L’historiographie et l’identité acadienne aux XIXe et XXe siècles |trans-chapter=Historiography and Acadian identity in the 19th and 20th centuries}}</ref> They consist mainly of workers attracted by well-paid jobs in the primary sector.<ref name=":4" /> This exodus threatens the survival of some Maritime communities.<ref name=":4" />

=== Indigenous territories === [[File:Provinces maritimes nations.png|thumb|Map of Acadia and its neighboring cultural areas with Mi'kmaq reserves.]]

During the French regime, France did not recognize Maliseet and Mi'kmaq sovereignty over their territories but ensured they were respected in their use of them.<ref name="LL_49-51">{{harvnb|Landry|Lang|2001|pp=49–51}}</ref> For their part, the Indigenous peoples considered the lands merely lent to the French and Acadians.<ref name="LL_49-51" /> Although the arrival of Europeans changed Indigenous habits and many died from European diseases, relations were generally cordial, with each population occupying its own territory.<ref name="LL_49-51" /> ''Métissage'' was common but denigrated at the end of the French regime; Acadians married to Indigenous women were more interested in their wife's culture, whereas the stated goal of ''métissage''—promoted by the government—was to assimilate the Indigenous peoples.<ref name="LL_51-52">{{harvnb|Landry|Lang|2001|pp=51–52}}</ref>

The Maliseet and Mi'kmaq still exist and own lands—Indian reserves—some of which are enclaved in Acadia. Some reserves have seen their territory reduced over the years, sometimes illegally. This is one reason several communities seek to reclaim larger territories.<ref>{{Cite book |last=Paul |first=Daniel N. |title=We Were Not the Savages: Collision between European and Native American Civilizations |edition=3rd|url=https://books.google.com/books?id=UBMoAAAACAAJ |publisher=Fernwood |year=2006 |isbn=978-1-55266-209-0 |pages=278–285}}</ref>

=== Anglophone population and immigrants === The immigrant population had little real impact on the definition of Acadia's territory.<ref>{{Harvtxt|Griffiths|2005|p=428}}</ref>

== Influence of Acadia's borders to the present day == Uncertainties regarding Acadia's borders continue to influence the present and have led to several border conflicts between Canada and the United States, as well as between provinces and states.<ref name=":2"/>

=== International border === {{Main|Canada–United States border}}

==== American Revolutionary War and Treaty of Paris (1783) ==== thumb|left|The first page of the Treaty of Paris. thumb|The Mitchell Map.

A provisional treaty was signed in 1782 between the United States and Great Britain.<ref name="Van Zandt_14-16">{{harvnb|Van Zandt|1976|pp=14–16}}</ref> It determined the border with Nova Scotia as beginning at the mouth of the St. Croix River in the Bay of Fundy, ascending its course to its source, and then following a due north line to the northwest angle in the "highlands,"<ref name="Ganong_241-243">{{harvnb|Ganong|1901|pp=241–243}}</ref> essentially the same border given to Nova Scotia by Great Britain in 1763.<ref name="Ganong_223-225">{{harvnb|Ganong|1901|pp=223–225}}</ref> The commissioners relied on the Mitchell Map of 1755, considered the best of its time.<ref name="Ganong_241-243" /> The Treaty of Paris (1783) of 1783 ended the American Revolutionary War and reiterated essentially the same border.<ref name="Van Zandt_14-16" /> From that moment, the northern U.S. border became a source of discord with the United Kingdom and then Canada, persisting to the present day.<ref name="Van Zandt_14-16" />

==== Search for the St. Croix River ==== thumb|The St. Croix River at its mouth.

The exact location of the St. Croix River was quickly forgotten. The first known topographic description was made in April 1764 by Massachusetts governor Francis Bernard to John Mitchell, tasked with surveying Passamaquoddy Bay and determining the river's exact location.<ref name="Ganong_228-239">{{harvnb|Ganong|1901|pp=228–239}}</ref> Bernard referred to a waterway then called the Scoodic River, which proved to be the sought-after St. Croix.<ref name="Ganong_228-239" /> In June 1764, Mitchell noted in his journal that Indigenous peoples considered the Magaguadavic River the St. Croix; he produced a map whose original has not survived.<ref name="Ganong_228-239" /> The Pownall map of 1776 was the first printed map illustrating this theory.<ref name="Ganong_228-239" /> Mitchell seems to have misinterpreted Cyprian Southack's 1715 plan, which identified the Magaguadavic as the St. Croix and named the Scoodic the Passamaquoddy River—an error repeated in his report and map.<ref name="Ganong_228-239" /> In 1765, Charles Morris was sent on an expedition to Passamaquoddy Bay.<ref name="Ganong_228-239" /> He identified the Cobscook River as the St. Croix and Treat Island as Dochet's Island but named the Scoodic as such and left the Magaguadavic unnamed; the wooded true Dochet's Island led him to mistake Treat Island's ruins for the French habitation.<ref name="Ganong_228-239" /> According to William Francis Ganong, Morris's main error stemmed from his desire to push Nova Scotia's border as far west as possible.<ref name="Ganong_228-239" /> In 1765, Governor Bernard, based on Mitchell's research and Samuel de Champlain's writings, sent a letter to Nova Scotia Governor Wilmot associating the Digdeguash River with the St. Croix; his error likely arose from consulting Champlain's 1632 edition, which had fewer and less accurate maps.<ref name="Ganong_228-239" /> In 1772, Thomas Wright produced a detailed regional map identifying the Scoodic as the Great St. Croix River and the Magaguadavic as the Little; in 1797, he testified under oath that he relied on local usage.<ref name="Ganong_228-239" />

Contradictory testimonies emerged at the time. Indigenous peoples supported the Magaguadavic as the St. Croix, a view shared by some local English settlers, while others claimed Indigenous peoples were coerced into this theory, some English said the name was recent, and others maintained the Scoodic and Magaguadavic were once the Great and Little St. Croix Rivers.<ref name="Ganong_228-239" /> In 1765, other Indigenous peoples told Morris they once called the Cobscook the St. Croix.<ref name="Ganong_228-239" />

In 1794, Article V of the Jay Treaty provided for a bilateral commission to determine the St. Croix's location.<ref name="Van Zandt_16-17">{{harvnb|Van Zandt|1976|pp=16–17}}</ref> On {{date|25|October|1798}}, the three commissioners recognized the Scoodiac and St. Croix as the same waterway; a monument was erected at its source.<ref name="Van Zandt_16-17" />

==== War of 1812 and Treaty of Ghent (1814) ==== thumb|Signing of the Treaty of Ghent.

The Treaty of Ghent, signed in 1814, ended the War of 1812 and was intended to resolve uncertainties from the Treaty of Paris.<ref name="Van Zandt_17-20">{{harvnb|Van Zandt|1976|pp=17–20}}</ref>

==== Aroostook War and Webster–Ashburton Treaty ==== thumb|left|Border uncertainties leading to the Aroostook War.

{{Main|Northwest Angle|Aroostook War|Webster–Ashburton Treaty}}

The ambiguities in the 1783 Treaty of Paris led to escalating tensions over the Maine–New Brunswick border, culminating in the Aroostook War (1838–1839), a bloodless conflict involving militia mobilizations but no combat.<ref name=":0"/> The dispute centered on timber-rich lands, with both sides claiming the area based on differing interpretations of the "highlands" and the St. Croix's source.<ref name=":0"/> The Webster–Ashburton Treaty of 1842 resolved it, awarding most of the disputed territory to Maine while preserving a British route from Halifax to Quebec, and establishing the modern border.<ref name="Van Zandt_17-20" />

==== Other treaties and conflicts ==== thumb|The Canada–U.S. border in 1941.

Canadian sovereignty over Campobello Island was recognized by a convention in 1817.<ref>{{Harvtxt|Moore|1898|p=125}}</ref> The 1908 treaty between the United States and the United Kingdom established a commission to maintain the border.<ref name="Van Zandt_29">{{harvnb|Van Zandt|1976|p=29}}</ref> It stipulated that all previously recognized borders were fixed, ignoring potential geological changes.<ref name="Van Zandt_29" /> The 1910 treaty clarified the border in Passamaquoddy Bay, a line from a point between Treat Island and Campobello Island generally south to the middle of the Grand Manan Channel; Pope's Folly Island and the lighthouse between Woodward Point and Cranberry Point were left to the United States.<ref name="Van Zandt_29" /> The 1925 treaty shifted the Grand Manan Channel endpoint by {{cvt|2383|m|ft}}, gaining {{cvt|9|acre}} for Canada.<ref name="Van Zandt_32">{{harvnb|Van Zandt|1976|p=32}}</ref>

The proposed Eastport oil port in Maine created a Canada–U.S. conflict at the turn of the 21st century.<ref>{{Cite web |last=Toensing |first=Gale Courey |date=May 7, 2010 |title=Passamaquoddy group defeats LNG project on sacred ground |url=https://ictnews.org/archive/passamaquoddy-group-defeats-lng-project-on-sacred-ground/ |access-date=November 22, 2025 |website=ICT |language=en-US}}</ref>

=== Border between Quebec and New Brunswick === thumb|Topographic map of New Brunswick illustrating modern borders.|left

The border was fixed in 1851 by a British act<ref name="DorionLacasse_120-122">{{harvnb|Dorion|Lacasse|2011|pp=120–122}}</ref> and demarcated between 1853 and 1855; it was the first interprovincial border to undergo this process.<ref name="Nicholson_153-161">{{harvnb|Nicholson|1979|pp=153–161}}</ref> However, Restigouche River islands are considered part of New Brunswick, but some have disappeared or emerged over time, making this segment uncertain.<ref name="DorionLacasse_120-122" /> The easternmost part depends on the status of the Gulf of Saint Lawrence.<ref name="DorionLacasse_120-122" />

The border originates from the 1763 division of the Province of Quebec, following the highlands dividing the St. Lawrence and Atlantic watersheds to Chaleur Bay.<ref name=":1">{{Harvtxt|Nicholson|1979|p=22–27}}</ref> Disputes arose in the 19th century over timber and land, leading to arbitration in 1851 under the King of the Netherlands, though the award was partially rejected.<ref>{{Harvtxt|Moore|1898|p=112–115}}</ref> Modern issues include resource management and environmental concerns, but the border is stable.<ref name="DorionLacasse_120-122" />

=== Border between New Brunswick and Nova Scotia === The border between New Brunswick and Nova Scotia was unofficially recognized by Isthmus of Chignecto residents as early as 1800.<ref name="Nicholson_153-161" /> Its exact demarcation was difficult because the Missaguash River's source is in a marshy area, but a line was finally demarcated in 1856.<ref name="Nicholson_153-161" />

The border follows the Missaguash River from its mouth at Chignecto Bay to a point near Baie Verte, then east to the Petitcodiac River, and north along that river to its source, before proceeding due north.<ref>{{Cite book |last=Trueman |first=Stuart |url=https://archive.org/details/chignectoisthmus00trueuoft/page/240/mode/2up |title=The Chignecto Isthmus and Its First Settlers |publisher=William Briggs |year=1902 |isbn=978-0554000350 |pages=240–242}}</ref> It stems from the 1784 separation of New Brunswick from Nova Scotia and was formalized to resolve logging disputes.<ref>{{Cite book |last=Raymond |first=W.O. |url=https://archive.org/details/riverstjohnitsph00raymuoft |title=The River St. John: Its Physical Features, Legends and History |publisher=John A. McMillan |year=1910 |pages=412–413}}</ref> No major modern disputes exist.<ref>{{Harvtxt|Nicholson|1979|p=153–161}}</ref>

=== Border between Quebec and Prince Edward Island === The border between Quebec and Prince Edward Island is maritime, defined by the Gulf of St. Lawrence. It was established through 1964 and 1972 interprovincial agreements on sea borders, using equidistant lines from the shores.<ref name=":5">{{Cite web |last=Office for Ocean Affairs and the Law of the Sea |title=The Law of the Sea: Maritime Boundary Agreements (1970-1984) |url=https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/publications/E.87.V.12.pdf |url-status=live |archive-url=https://web.archive.org/web/20121102204550/https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/publications/E.87.V.12.pdf |archive-date=November 2, 2012 |access-date=November 22, 2025 |website=un.org}}</ref> Quebec recognizes these as binding, confirmed by commissions in 1966 and 1991.<ref>{{Cite journal |last=Makovka |first=Aaron |date=2023 |title=Les limites territoriales et maritimes d'un Québec souverain |trans-title=The territorial and maritime boundaries of a sovereign Quebec |url=https://www.persee.fr/doc/rqdi_0828-9999_1993_num_8_2_1758 |journal=Revue québécoise de droit international |language=fr |volume=8 |issue=2 |pages=309–323 |doi=10.7202/1100895ar }}</ref> No significant disputes have arisen, though it could be relevant in Quebec independence scenarios.<ref name=":6">{{Cite journal |last=McDougall |first=John N. |year=1986 |title=The Maritime Boundaries of Quebec |url=https://www.sqrc.gouv.qc.ca/documents/institutions-constitution/commision-souverainete-1991-1992/15-JonathanICharney.pdf |url-status=dead |journal=Canadian Public Policy |volume=12 |issue=3 |pages=467–476 |doi=10.2307/3551222 |jstor=3551222 |archive-url=https://web.archive.org/web/20220323213411/https://www.sqrc.gouv.qc.ca/documents/institutions-constitution/commision-souverainete-1991-1992/15-JonathanICharney.pdf |archive-date=March 23, 2022 |access-date=November 22, 2025}}</ref>

=== Border between Quebec and Nova Scotia ===

The border between Quebec and Nova Scotia is also maritime in the Gulf of St. Lawrence, similarly defined by the 1964 and 1972 agreements using equidistant principles.<ref name=":5" /> It follows from the 1763 boundaries, with Nova Scotia's northern limit along the 47th parallel in parts of the gulf.<ref name=":1"/> Quebec upholds these agreements, with no active disputes.<ref name=":6" />

== Interpretations of Acadian boundaries since 1763 == The relationship between Acadians and their territory has long been complex. According to historian Julien Massicotte, the traumatic events of Acadian history—particularly the Deportation of 1755–1763—led many Acadians to identify more strongly with culture, language, and religion than with a fixed geographic space.<ref name="Massicotte_79-81">{{Harvtxt|Massicotte|Pâquet|Savard|2007|p=79–104}}</ref> Scholars such as Massicotte, Nicolas Landry, Nicole Lang, and Elsa Guerry emphasise that territory remains a central, yet constantly redefined, issue in Acadian identity.<ref name="LL_10">{{cite book |last1=Landry |first1=Nicolas |last2=Lang |first2=Nicole |url=https://books.google.com/books?id=SES4PQuGaooC |title=Histoire de l'Acadie |publisher=Septentrion |year=2001 |isbn=9782894481776 |language=fr |trans-title=History of Acadia}}</ref><ref>{{Harvtxt|Guerry|Basque|Couturier|2005|p=15–24}}</ref>

For many Atlantic-Canadian Acadians, the existence of “Acadia” is taken as self-evident, even in the absence of official political recognition.<ref name="Daigle_141">{{Harvtxt|Daigle|1993|p=141}}</ref> Poet Pierre Perrault famously described Acadian geography as a “geography of the soul”,<ref name="Massicotte_79-81" /> while geographer Cécyle Trépanier has argued that the very ambiguity of the term ''Acadia'' sustains its mythic power.<ref name="trepanier_1996">{{cite journal |last=Trépanier |first=Cécyle |title=Le mythe de « l'Acadie des Maritimes » |journal=Géographie et cultures |issue=17|pages=121–134|access-date=November 22, 2025|year=1996 |trans-title=The myth of “Acadia in the Maritimes” |url=https://www.persee.fr/doc/ingeo_0020-0093_1997_num_61_5_5834_t1_0216_0000_5 |language=fr}}</ref>

=== Historical development ===

Historical awareness of a distinct Acadian identity emerged at different moments according to scholars: Naomi Griffiths places its origins before the Deportation, while {{Interlanguage link|Joseph Yvon Thériault|fr|Joseph Yvon Thériault}} dates it to the 1880s.<ref name="Massicotte_79-81"/> Regardless, the mid-19th century witnessed a demographic boom and the creation of Acadian institutions during the period known as the Acadian Renaissance.<ref name="Massicotte_81-85"/> This renaissance partly defined itself against French-Canadian nationalism, emphasising language, culture, and Catholicism over territorial claims.<ref name="Massicotte_81-85"/>

Two 19th-century historians profoundly shaped early conceptions. François-Edme Rameau de Saint-Père viewed Acadia as wherever Acadians lived, seeing diaspora communities as potential seeds of a new nation.<ref name="Massicotte_81-85" /> Pascal Poirier stressed blood ties, describing Acadians as a distinct “race”.<ref name="Massicotte_81-85" /> Massive late-19th-century emigration to the United States reinforced a non-territorial vision, exemplified by the founding of the ''Société l'Assomption'' in Massachusetts in 1903.<ref name="Massicotte_81-85" />

From the 1920s to the 1950s, a tragic narrative dominated, portraying Acadians as martyrs defined by the Deportation and faith.<ref name="Massicotte_85-87">{{Harvtxt|Massicotte|Pâquet|Savard|2007|p=85–87}}</ref> Historians such as Émile Lauvrière, Antoine Bernard, and Robert Rumilly popularised this “tragic Acadia”, which coexisted with a more concrete regional vision focused on post-Deportation settlements.<ref name="Massicotte_85-87" />

The Antigonish Movement and the establishment of social-science education in Memramcook in 1939 gradually shifted perceptions toward contemporary socio-economic realities.<ref name="Massicotte_87-92">{{Harvtxt|Massicotte|Pâquet|Savard|2007|p=87–92}}</ref>

In 1987, New Brunswick geographer Adrien Bérubé proposed four contemporary conceptions of Acadia: historical, diasporic, operational, and prospective.<ref name="Berube_202-208">{{Harvtxt|Bérubé|1987|p=202–208}}</ref> During the 1990s, Cécyle Trépanier conducted hundreds of interviews and concluded that none of Bérubé’s categories fully matched popular perceptions.<ref name="Trepanier_1994">{{cite journal |last=Trépanier |first=Cécyle |year=1994 |title=À la recherche de l'Acadie et des perceptions identitaires des Acadiens des Provinces maritimes du Canada |trans-title=In Search of Acadia and the Identity Perceptions of Acadians in Canada's Maritime Provinces |url=https://icrml.ca/en/research-and-publications/references/item/77415-a-la-recherche-de-l-acadie-et-des-perceptions-identitaires-des-acadiens-des-provinces-maritimes-du-canada-at-the-research-of-acadia-and-canada-maritime-province-acadians-identitary-perceptions |journal=Études canadiennes / Canadian Studies |language=fr |volume=37 |pages=183–195}}</ref>

=== Bérubé’s four conceptions ===

Bérubé linked each conception to distinct ideologies, symbols, and uses of the Acadian flag and name.<ref name="Berube_208-220">{{Harvtxt|Bérubé|1987|p=208–220}}</ref>

==== Historical Acadia ====

The territory that disappeared irrevocably in 1713 or 1763. Some, including historian Michel Roy and scholar Léon Thériault, consider any post-1763 reference to Acadia paradoxical or an act of faith.<ref name="Daigle_45">{{Harvtxt|Daigle|1993|p=45}}</ref>

thumb|Countries and regions with Acadian diaspora communities|left ==== Diasporic (genealogical) Acadia ==== Encompasses all descendants of the deported Acadians worldwide (estimated at over three million by genealogist Stephen A. White).<ref name="Berube_202-208" /> Being Acadian is a matter of “blood” or ancestry. Bérubé described it as an “interior homeland” or “moral state” existing in the hearts of “Acadian cousins”.<ref name="Berube_202-208" /> The Acadian flag functions here as a kinship symbol, similar to Scottish tartans.<ref name="Berube_208-220" />thumb|Regions with significant francophone populations in Atlantic Canada ==== Operational Acadia ==== Defines Acadian identity primarily through French language and culture. All francophones in the Maritime provinces are often implicitly considered Acadian. This conception facilitates statistical study using census data.<ref name="Berube_202-208" /> The term “Acadia des Maritimes” (Maritime Acadia) is frequently used synonymously, though Trépanier has called it conceptually “empty of meaning” while acknowledging its rhetorical usefulness.<ref name="trepanier_1996" /> Inclusion of Newfoundland and Labrador remains debated, though the broader label “''Acadia de l’Atlantique''” has gained currency.<ref name="Massicotte_98">{{Harvtxt|Massicotte|Pâquet|Savard|2007|p=98}}</ref>

thumb|Approximate map of a proposed Acadian province in northern and eastern New Brunswick|left

==== Prospective (New) Acadia ==== {{See also|Proposed canadian provinces and territories}}Focuses on francophone areas of New Brunswick, where Acadian identity can be acquired through voluntary participation in a French-speaking community, regardless of ancestry. The Acadian flag is often displayed alone as a political statement. It represents a project for official recognition, potentially as a new province or through enhanced autonomy.<ref name="Berube_202-208" /> === Additional popular conceptions (Trépanier) === Trépanier’s interviews revealed further nuances:

* “Felt and lived” Acadia – defined by lifestyle and emotional attachment rather than geography or history. * “Disconcerting” Acadia – the difficulty or refusal of many Acadians to locate Acadia precisely. * “Folklore” Acadia – a tourist-oriented, nostalgic vision (supported by only 4% of respondents), epitomized by sites such as the Village Historique Acadian.<ref name="Trepanier_1994" />

== Cartography of Acadia == === Pre-1763 ===

thumb|Bellin’s 1757 map of Acadia and neighboring regions Historical boundaries of Acadia were contested between France and Britain long before 1763, with no universally accepted limits.<ref>{{Harvtxt|Ganong|1901|p=139–232}}</ref>

=== Post-1763 ===

The absence of an official map is sometimes cited as proof that Acadia does not exist, yet numerous maps have been produced, especially during the identity debates of the 1980s.<ref name="Berube_201-202">{{Harvtxt|Bérubé|1987|p=201–202}}</ref>

Bérubé identified four cartographic approaches:

* Historical (e.g., Alan Rayburn) – attempting to reconstruct pre-conquest boundaries.<ref>{{cite book |last=Rayburn |first=Alan |author-link=Alan Rayburn |url=https://leglibbibcat.legnb.ca/bib/1034 |title=Acadia: The Origin of the Name and Its Geographical and Historical Utilization |publisher=Cartographica |year=1973 |volume=10 |pages=1–7 |doi=10.3138/9616-83R9-8772-1G2J |issue=1}}</ref> * Post-Deportation settlement patterns (e.g., R.A. Leblanc).<ref>{{cite book |last=LeBlanc |first=Raymond A. |url=https://books.google.com/books?id=BscRAQAAIAAJ |title=Du Grand Dérangement à la Déportation: la dislocation d'une ethnie, 1755-1761 |publisher=Chaire d’études acadiennes, Université de Moncton |year=1987 |isbn=9781897214022 |language=fr |trans-title=From the Great Upheaval to Deportation: The Dislocation of an Ethnic Group, 1755–1761}}</ref> * Mental maps collected from residents (e.g., C. Williams). * Statistical mapping using linguistic census data (Bérubé’s own method).<ref name="Berube_201-202" />

Many maps are either over-inclusive or under-inclusive because of assimilation, varying local identities, and lack of official status.<ref>{{cite journal |last=Bujold |first=Stéphan |year=2009 |title=L'Acadie? Quoi ça? Les Acadiens? Qui ça? Esquisse d'un territoire indéfini et d'un peuple éparpillé |trans-title=Acadia? What's that? The Acadians? Who are they? Sketch of an undefined territory and a scattered people |url=https://societehistoriqueacadienne.wordpress.com/wp-content/uploads/2018/04/4002_total1.pdf |journal=Cahiers de la Société historique acadienne |language=fr |volume=40 |issue=2 |pages=41–58}}</ref> == Official recognition == thumb|Officially recognized Acadiana region in Louisiana Louisiana’s 22-parish Acadiana region was officially designated in 1971.<ref name=":7">{{Cite book |last=Brasseaux |first=Carl A. |url=https://www.researchgate.net/publication/318598170 |title=Louisiana's Historic Cajun Country |publisher=Louisiana State University Press |year=2011 |isbn=9780807137239 |page=200}}</ref> Newfoundland and Labrador’s francophone community gained provincial recognition in 1992.<ref name=":7" />

In Canada, section 16.1 of the Canadian Charter of Rights and Freedoms (1993) acknowledges New Brunswick’s French linguistic community without delimiting territory. Prime Minister Stephen Harper recognized Acadia’s existence but declined to grant it “nation” status comparable to Quebec (2006).<ref>{{Cite news |date=November 28, 2006 |title=Nation' motion passes, but costs Harper |url=https://www.theglobeandmail.com/news/national/nation-motion-passes-but-costs-harper/article1110906/ |access-date=November 22, 2025 |work=The Globe and Mail |language=en-CA}}</ref>

== Future of Acadian boundaries == Possible scenarios include maintaining the status quo, progressive duality within existing provinces, creation of an Acadian province, or union/annexation with Quebec. Support for annexation or independence has historically been low (25% in 1964, 7% at the 1979 convention).<ref name="hatfield">{{cite book |last=Hatfield |first=Richard |url=https://books.google.com/books?id=HzuvXSf0jD0C |title=Richard Hatfield: The Seventeen Year Saga |publisher=Formac |year=1988 |isbn=9780887801532 |pages=130}}</ref> Maritime union is occasionally proposed but generally seen as benefiting anglophones more than Acadians.<ref>{{cite book |last=Hautecoeur |first=Jean-Paul |url=https://classiques.uqam.ca/contemporains/hautecoeur_jean_paul/acadie_du_discours/acadie_du_discours.html |title=L'Acadie du discours: pour une sociologie de la culture acadienne |publisher=Presses de l’Université Laval |year=1975 |isbn= |language=fr |trans-title=Acadia in discourse: towards a sociology of Acadian culture |doi=10.7202/303495 |doi-broken-date=29 December 2025 |issn=0035-2357}}</ref>

==See also==

* Acadia * History of Acadia * Expulsion of the Acadians * Acadian Renaissance * Quebec nationalism * Cajuns * Acadiana * Maritime Union * Antigonish Movement * Société Nationale de l'Acadia * Flag of Acadia * French language in Canada * Territorial evolution of Canada

==Notes and references== ===Notes=== {{reflist|group=note}}

=== References === {{Reflist}}

== Bibliography ==

* {{cite book |last=Bérubé |first=Adrien |chapter=De l'Acadie historique à la Nouvelle-Acadie: les grandes perceptions contemporaines de l'Acadie |trans-chapter=From Historic Acadia to New Acadia: Contemporary Perceptions of Acadia |trans-title=The Acadians: state of research |url=https://books.google.com/books?id=nhcVAAAAYAAJ |title=Les Acadiens: état de la recherche |series=Collection Perspectives |year=1987 |pages=198–225 |issn=0382-0262 |language=fr}} * {{Cite book |last=Brasseaux |first=Carl A. |url=https://books.google.com/books?id=R3xaRPSluLsC |title=The Founding of New Acadia: The Beginnings of Acadian Life in Louisiana, 1765–1803 |publisher=Louisiana State University Press |year=1987 |isbn=978-0-8071-1296-0}} * {{Cite book |last=Carroll |first=Francis M. |url=https://books.google.com/books?id=1AjlS20Q5J8C |title=A Good and Wise Measure: The Search for the Canadian-American Boundary, 1783–1842 |publisher=University of Toronto Press |year=2001 |isbn=978-0-8020-8358-6}} * {{cite book |last1=Daigle |first1=Jean |url=https://books.google.com/books?id=OZ4qAQAACAAJ |title=L'Acadie des Maritimes: études thématiques des débuts à nos jours |publisher=Centre d’études acadiennes, Université de Moncton |year=1993 |isbn=2-921166-06-2 |language=fr |trans-title=Acadia in the Maritimes: thematic studies from the early days to the present day}} * {{Cite book |last=Ganong |first=William F. |author-link=William Francis Ganong |title=A Monograph of the Evolution of the Boundaries of the Province of New Brunswick |publisher=Royal Society of Canada |year=1901 |url=https://books.google.com/books?id=ZMFYAAAAMAAJ}} * {{Cite book |last=Griffiths |first=N.E.S. |url=https://books.google.com/books?id=cG4wSmIlziYC |title=From Migrant to Acadian: A North American Border People, 1604–1755 |publisher=McGill-Queen's University Press |year=2005 |isbn=978-0-7735-2699-0}} * {{Cite book |last1=Guerry |first1=Elsa |last2=Basque |first2=Maurice |last3=Couturier |first3=Jacques Paul |url=https://fondationlionelgroulx.org/publication/l-acadie-hier-et-aujourd-hui-l-histoire-d-un-peuple |title=L'Acadie hier et aujourd'hui : l'histoire d'une déportation |publisher=Éditions d'Acadie |year=2005 |isbn=9780976892748 |location=Moncton |language=fr |trans-title=Acadia Yesterday and Today: The History of a Deportation}} * {{cite book |last1=Massicotte |first1=Julien |last2=Pâquet |first2=Martin |last3=Savard |first3=Stéphane |trans-title=Tags and references: Acadias, Francophone communities |chapter=Le territoire acadien: contextes et perceptions |trans-chapter=Acadian territory: contexts and perceptions |title=Balises et références: Acadies, francophonies |publisher=Presses de l’Université Laval |year=2007 |pages=79–104 |isbn=978-2-7637-8535-6 |url=https://books.google.com/books?id=dHlG9QMjh2UC |language=fr}} * {{Cite book |last=Moore |first=John Bassett |title=History and Digest of the International Arbitrations to which the United States Has Been a Party |volume=1 |publisher=Government Printing Office |year=1898 |url=https://books.google.com/books?id=XuGfM0qmzRYC}} * {{Cite book |last=Nicholson |first=Brendan |url=https://books.google.com/books?id=_Z48mAEACAAJ |title=The Boundaries of the Canadian Confederation |publisher=Macmillan of Canada |year=1979 |isbn=9780770517427}} * {{cite journal |last=Trépanier |first=Cécyle |title=Le mythe de « l'Acadie des Maritimes » |journal=Géographie et cultures |issue=17 |year=1996 |trans-title=The myth of “Acadia in the Maritimes” |url=https://www.persee.fr/doc/ingeo_0020-0093_1997_num_61_5_5834_t1_0216_0000_5 |language=fr}} * {{cite book |last1=Thériault |first1=Joseph-Yvon |url=https://www.erudit.org/fr/livres/culture-francaise-damerique/identite-cultures-nationales-lamerique-francaise-en-mutation/ |title=Identité et cultures nationales: L'Amérique française en mutation |publisher=Presses de l’Université Laval |year=1995 |isbn=2-7637-7424-5 |language=fr |trans-title=Identity and national cultures: French America in transition}} * {{Cite book |last=Van Zandt |first=Franklin K. |title=Boundaries of the United States and the Several States |publisher=U.S. Geological Survey |year=1976 |url=https://books.google.com/books?id=skxAAAAAIAAJ}} * {{Cite book |first1=Henri |last1=Dorion |first2=Jean-Paul |last2=Lacasse |title=Le Québec: territoire incertain |publisher=Les éditions du Septentrion |year=2011 |trans-title=Québec: uncertain territory |isbn=978-2894486610}}

{{Acadia}}

{{Portal|Canada|France|Geography|Louisiana}}

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