How did the United States’ containment policy affect one major aspect of the Cold War?? WORLD STUDIES HELP?

How did the United States’ containment policy affect one major aspect of the Cold War (Truman Doctrine, Marshall Plan, Restructuring of Japan, Korean War, Hungarian Revolution, or the Berlin Wall). State whether or not the events related to that aspect of the Cold War could be considered part of the United States’ policy of containment.