Why did the United States and the Soviet Union go from being allies during World War II to enemies in the post-war period?

The reason why the US became enemies with the USSR, and their communist allies was because of communism. Communism vs. Democracy was the overall premise of the Cold War. Yes, they were helpful in War, but after WW2 communist started spreading in Eastern Europe and South East Asia.

Explanation:

answer: alexander hamilton

explanation: alexander hamilton was george washington's right hand man. he took an early role in the militia as the american revolutionary war began. in 1777, he became a senior aide to general washington in running the new continental army.