Both The US, UK, and USSR knew that annexing the the Nazi heartland in Berlin would end the war within the European theatre through and allied victory. Early in 1945, Stalin, Churchill, and Roosevelt agreed to meet to discuss the postwar political environment of Europe. Even though they agreed to separate Berlin into separate zones, both the US and USSR feared one another's influence would be stronger over postwar Europe (as the UK would not be as dominant a power due to exhaustion from the war). Therefore, it was a race for both sides to reach Berlin first, as it was believed the first to get there would have a stronger influence over the events following Germany's loss in WWII
The Federalists were Pro-British ( they supported the Jay Treaty which brought continuity of trade between Britain and America fostering interdependence) John Adams went against his party's orders, by trying to avoid war with France. The Federalists wanted war because it would increase military power showing the people that increasing military power was a necessity in order to protect the new nation from tyrants. The Federalists saw it as an opportunity to turn US citizens against France.
United States participation in the ICC treaty regime would also be unconstitutional because it would allow the trial of U.S. citizens for crimes committed on U.S. soil, which are otherwise entirely within the judicial power of the United States.
