The Russian Revolution of 1917, followed by the Russian Civil War caused a rift between the Soviet Union and the United States. But when President Franklin Roosevelt took office in 1933, diplomatic and trade relations between the two countries resumed. The relationship was strained yet again after the USSR annexed the Baltic States and signed a non-aggression pact with Nazi Germany.
Despite their differences the Soviet Union and the United States found themselves allied after the German invasion of Russia in June 1941. As the war in Europe began to wind down and victory was in sight, the two countries had very different views as to what the post-war world would look like. At the Potsdam Conference, just before the atom bomb was dropped on Japan, it became clear that Stalin wanted to put Eastern Europe under the Soviet sphere of influence, setting the conditions for the Cold War to commence. Episode 1 includes interviews from George F. Kennan, Zoya Zarubina, Hugh Lunghi and George Elsey.
https://edition.cnn.com/2014/01/02/world/the-cold-war-landmark-documentary/index.html
The struggle between communism and capitalism defined the second half of the 20th Century. The Cold War pitted east against west, pushing the world to the brink of nuclear war.It describes the events that shaped the tense relationships between the Soviet Union and the United States.