Comment: The Evacuation of Boston, March 17, 1776

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The Evacuation of Boston, March 17, 1776

http://popartmachine.com/art/LOC+1080458/THE-EVACUATION-OF-B......

"I, __________, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic."

https://en.wikipedia.org/wiki/Oath_of_enlistment

There is no duration defined in the Oath