Containment:the action of keeping something harmful under control or within limits.
Truman Doctrine:was an American foreign policy to stop Soviet imperialism during the Cold War. It was announced to Congress by President Harry S. Truman on March 12, 1947 when he pledged to contain Soviet threats to Greece and Turkey.
Cuban Missile Crisis
Marshall Plan:was an American initiative to aid Europe, in which the United States gave $13 billion (approximately $130 billion in current dollar value as of August 2015) in economic support to help rebuild European economies after the end of World War II. The plan was in operation for four years beginning in April 1948.
Warsaw Pact:a treaty of mutual defense and military aid signed at Warsaw on May 14, 1955, by communist states of Europe under Soviet influence, in response to the admission of West Germany to NATO. The pact was dissolved in 1991.
Berlin Airlift: A military operation in the late 1940s that brought food and other needed goods into West Berlin by air after the government of East Germany, which at that time surrounded West Berlin (see Berlin wall) (see also Berlin wall), had cut off its supply routes.