Is their answers to choose from?
and i think it might be aribic
Assuming you're referring to the American Revolution, the revolutionaries felt they were in danger because the British far outmatched them in terms of man power and skill. To remedy this the colonists turned to foreign aid, especially from the French.
A soldier would speak those words, and when first being recruited into the army. He has to swear because if soldiers put personal obligation above their country, then the army would be crippled. Aye, a hard life.