{{Short description|American airbase in Syria (2014–2025)}} {{Use dmy dates|date=November 2025}} {{Infobox military installation | name = Mission Support Site Conoco | ensign = | ensign_size = | native_name = | partof = <!-- for elements within a larger site --> | location = Deir ez-Zor Governorate | nearest_town = <!-- used in military test site infobox --> | country = Syria | image = | alt = | caption = | image2 = <!--secondary image, major command emblems for airfields --> | alt2 = | caption2 = | coordinates = <!-- {{Coord}} --> | gridref = | type = | image_map = | image_mapsize = | image_map_alt = | image_map_caption = | pushpin_map = | pushpin_mapsize = | pushpin_map_alt = | pushpin_map_caption = | pushpin_relief = | pushpin_image = | pushpin_label = | pushpin_label_position = | pushpin_mark = | pushpin_marksize = | code = <!--facility/installation code --> | site_area = <!-- area of site m2, km2 square mile etc --> | floor_area = | height = <!-- height of tallest part, not above sea level --> | length = <!-- for border fences or other DMZs --> | ownership = {{flagicon|USA}} U.S. forces (formerly) | operator = 20px CJTF–OIR | controlledby = <!-- such as RAF Bomber Command or the Eighth Air Force --> | open_to_public = <!-- for out of use sites/sites with museums etc --> | condition = | site_other_label = <!-- for renaming "Other facilities" in infobox --> | site_other = <!-- for other sorts of facilities – radar types etc --> | website = | built = {{Start date|2014}} | built_for = | builder = | architect = | used = | materials = | fate = <!--changed from demolished parameter--> | demolished = {{End date|2025}} | battles = Syrian civil war<br/>Iran–Israel proxy conflict | events = | current_commander = <!-- current commander --> | past_commanders = <!-- past notable commander(s) --> | garrison = <!-- such as the 25th Bombardment Group --> | occupants = <!-- squadrons only --> | designations = | nrhp = | footnotes = <!-- catchall in case it's needed to preserve something in infobox that doesn't work in new code --> }}
'''Mission Support Site Conoco''', {{aka}} '''Mission Support Site Euphrates''', was an American airfield near the town of Khsham in Deir ez-Zor Governorate, Syria, and served to support the multi-national Combined Joint Task Force – Operation Inherent Resolve.<ref name=ConocoClosed/><ref>{{cite press release |author=<!--not stated or generic "Staff"--> |title=Operation Inherent Resolve Fact Sheet |publisher=United States Central Command |date=<!--not stated--> |url=https://www.inherentresolve.mil/Portals/14/Documents/Mission/History.pdf?ver=2016-03-23-065243-743 |access-date=2025-11-19 |archive-url=https://web.archive.org/web/20170416035906/https://www.inherentresolve.mil/Portals/14/Documents/Mission/History.pdf?ver=2016-03-23-065243-743 |archive-date=2017-04-16 |url-status=live}}</ref> The airbase, built with the 2014 launch of Operation Resolve and the American intervention in the Syrian civil war, is {{convert|5|mi|km}} away from the Syrian outpost Conoco; the use of Conoco in the two names reflects names attached to the petroleum production sites in the area which were originally developed by American company Conoco.<ref>{{cite news |first=David S. |last=Cloud |title=Inside U.S. troops' stronghold in Syria, a question of how long Biden will keep them there |work=Los Angeles Times |date=12 March 2021 |url=https://www.latimes.com/politics/story/2021-03-12/us-troops-syria-civil-war-biden |url-access=subscription |access-date=2025-11-18 |archive-url= https://web.archive.org/web/20250713035748/https://www.latimes.com/politics/story/2021-03-12/us-troops-syria-civil-war-biden |archive-date=2025-07-13 |url-status=live}}</ref>
In 2018, Mission Support Site Conoco provided tactical support, ground troops and air strikes during a four-hour long overnight attack on outpost Conoco by a combined force of Syrian government troops and Russian Wagner Group mercenaries.<ref>{{cite news |first=Thomas |last=Gibbons-Neff |title=How a 4-Hour Battle Between Russian Mercenaries and U.S. Commandos Unfolded in Syria |work=The New York Times |department=World News |date=2018-05-24 |p=A5 |url=https://www.nytimes.com/2018/05/24/world/middleeast/american-commandos-russian-mercenaries-syria.html |url-access=subscription |access-date=2025-11-19 |archive-url=https://web.archive.org/web/20251008104749/https://www.nytimes.com/2018/05/24/world/middleeast/american-commandos-russian-mercenaries-syria.html |archive-date=2025-10-08 |url-status=live}}</ref> In 2023 and 2024, it was reported that Mission Support Site Conoco had been the target of numerous attacks by Iranian proxy groups and the former Syrian Arab Armed Forces under the Ba'athist regime.<ref>{{cite press release |author=<!--not stated or generic "Staff"--> |title=Two Rockets Target Coalition Forces |publisher=United States Central Command |date=4 January 2023 |url=https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/3258231/two-rockets-target-coalition-forces/ |access-date=30 November 2024}}</ref><ref>{{cite news |last=Bath |first=Alison |title=US forces are under regular attacks by militants at base near Syrian government airfield |work=Stars and Stripes |date=25 November 2024 |url=https://www.stripes.com/theaters/middle_east/2024-11-25/syria-iraq-iran-troops-attacked-15959635.html |url-access=subscription |access-date=30 November 2024}}</ref>
After the December 2024 fall of the Assad regime, the United States reduced its military presence in Syria, and Mission Support Site Conoco was vacated in May 2025.<ref name=ConocoClosed>{{cite news |first=Laura |last=Korte |title=Pentagon confirms withdrawal from Syria bases used for anti-ISIS missions |work=Stars and Stripes |date=2025-08-04 |url=https://www.stripes.com/theaters/middle_east/2025-08-04/us-syria-bases-close-isis-18660997.html |url-access=subscription |access-date=2025-11-18 |archive-url=https://web.archive.org/web/20250810111209/https://www.stripes.com/theaters/middle_east/2025-08-04/us-syria-bases-close-isis-18660997.html |archive-date=2025-08-10 |url-status=live}}</ref>
==See also== *List of American military installations
==References== {{reflist}}
{{US-mil-hist-stub}} {{Syria-stub}}
{{coord missing|Syria}}
Category:Military installations of the United States in Syria Category:Deir ez-Zor Governorate Category:American involvement in the Syrian civil war