100 why was it in the best interests of the united states to have good relations with european powers?

if the question is not answered fully or if it makes no sense it will be reported

The United States and European powers had a lot of things in common. They were both against Nazi Germany during WW II and later formed the NATO against the USSR. So it was in the best interests that US had good relations with European powers.

i belive the classic sword and a shield would do

d. promised it other land