What describes the United States as one nation united under a single government, and later during the Civil War came to mean specifically the government and armies of the North

i would love to help but i don't know the answer

Explanation:

the answer that best explains what happened to george washington at fort necessity, pennsylvania is : washington was attacked by the french but was able to negotiate with them to peacefully end fighting. the battle took place on july 3, 1754. the battle is considered as being the start of the french and indian war.

letter a is the answer