End of WW2: Between 1945 and 1947 the USSR created satellite states in: East Germany, Romania, Poland, Albania, Czechoslovakia, Hungary, Yugoslavia and Bulgaria.
Feb 1946: American ambassador in USSR wrote The 'Long Telegram' to the USA, which stated:
The Soviets were determined to destroy the American way of life and would do everything they could to oppose America
The Soviets could be beaten
This could be done without going to war, using propaganda
March 1946: Churchill's 'Iron Curtain' speech in USA described an 'iron curtain' between Communist and Capitalist countries in Europe, showing deeper divisions between both sides.
Sep 1946: Telegram from Soviet ambassador in USA (Novikov) to Stalin stated:
USA hated communism and was preparing for a war
USA had money for a war but Soviet economy was weak
1947: Cominform was set up to strengthen the links between the Communist governments; Stalin could tell eastern European leaders what to do