# 400th

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**400th** may refer to:

- [400th anniversary of the Authorized King James Version](/source/400th_anniversary_of_the_Authorized_King_James_Version), set of events and exhibitions in 2011
- [400th Bombardment Group](/source/400th_Bombardment_Group), inactive United States Air Force unit
- [400th Missile Squadron](/source/400th_Missile_Squadron), inactive United States Air Force unit
- [America's 400th Anniversary](/source/America's_400th_Anniversary) or Jamestown 2007 - [Jamestown 400th Anniversary gold five dollar coin](/source/Jamestown_400th_Anniversary_gold_five_dollar_coin) - [Jamestown 400th Anniversary silver dollar](/source/Jamestown_400th_Anniversary_silver_dollar)

## See also

- [400 (number)](/source/400_(number))
- [400](/source/400), the year 400 (CD) of the Julian calendar
- [400 BC](/source/400_BC)

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Adapted from the Wikipedia article [400th](https://en.wikipedia.org/wiki/400th) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/400th?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.