Comment: Deuce

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In reply to comment: 10' X 6' may clear things up. (see in situ)

Deuce

Mr. Clemens

"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