In the aftermath of the war with mexico, the united states

B: gained large amounts of territory in the American Southwest.

Explanation:

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social act if im thinking of the right thing

explanation:

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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.