Why does grundy think that acquiring canada will strengthen the american union?

The correct answer is that Felix Grundy thought to drive the British from the continent and in that way to lessen the anger of the Native Americans whose tomahawks they all feared. When the nation would lose the valuable trade with the Canadians, it would lose the stability in general, and they will eventually go by themselves.

the answer is hope this you.

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.