In the late 1940's and 1950's the communism became known as The Red Scare. A Red Scare is the promotion of fear of a potential rise of communism
The revolution in Russia led to many Russian immigrants to come to the U.S. The people in the U.S.A. were panicking thinking everyone was a communist (or communist spies) this created more hatred towards each other.
The Yalta Conference;
The Yalta Conference was taken place in Livadia Palace, Ukraine. The countries involved was U.S.A. , Russia, Great Britain and France but later had another meeting in San Francisco to create the United Nations. This Meeting was with the WW2 winners to discuss on how to help Germany. There plan was to rebuild Germany , stop Nazism brain wash and to avoid another dictator.
Occupational Zones;
Germany was divided into four sections. (U.S.A. , Russia , France and Great Britain)
Russia wanted all of Germany so instead of helping they made it worst.THE U.S. disagreed with Russia's way of doing thing than they started to hate each other. The west felt like Russia was trying to expand communism.