To what extent did the US deterrence successfully contain communism?

The US was determined to implement a foreign policy of containment towards the USSR since the beginning of 1945. The US disagreed to requests Stalin made at the Yalta and Potsdam conference, which served to limit Stalin's power and control over Europe. President Truman became even more concerned after receiving George Kennan's Long Telegram in February 1946. This telegram was sent by the US ambassador in Moscow, reporting on the destructive intentions of the USSR. Truman made …

…success. The US was more successful towards the beginning of the Cold War when it was more determined. They succeeded in preventing Greece from falling to communism, along helping the European economy to take away the chance from the Soviets to spread communism, and saved South Korea from communism. However, in the later years they've seen numerous failures, such as China, Hungary, and Vietnam, excluding the Cuban Missile Crisis which proved to be a success.