Why had tensions already existed between the USA and the USSR BEFORE WW2?
Communism v Capitalism, US refused to recognize Communist Govt in USSR after 1917 revolution. 1917. USA backed "Whites" in the Russian Civil War.
What theory did Stalin have which explained why it took until 1944 for the USA to arrive in Europe?
He felt the West was hoping that the Nazis and the USSR would destroy each other.
Which country of Eastern Europe did the term "Salami Slicing" refer to when talking about how communists gained control?
Hungary. It had a non-communist government in 1946 but gradually Rakosi took more power.