Truman Doctrine: This was a policy announced by President Harry S. Truman in 1947 that provided aid and support to countries facing communist threats, aiming to contain communism's spread.
Marshall Plan: The Marshall Plan was an American initiative launched in 1948 that provided economic assistance to Western European countries devastated by World War II, with the goal of preventing them from falling under Soviet control.
NATO (North Atlantic Treaty Organization): NATO is a military alliance established in 1949 between North American and European countries for collective defense against potential aggression from the Soviet Union or other outside forces.