The condition of the United States after World War II.

Develop a comprehensive look at the condition of the United States after World War II. Why does a conflict emerge between the two wartime allies, the United States and the Soviet Union? What events feed the friction? What policy, articulated by whom, calling for what, does the United States ultimately adopt to respond to international events following World War II? Describe the applications of this policy from 1947 to 1950 in Europe.