* Marshall Plan: The United States provided economic aid to Western European countries to help them rebuild their economies after World War II. This aid was designed to prevent the spread of communism in Europe.
* NATO: The North Atlantic Treaty Organization was a military alliance formed by the United States, Canada, and Western European countries in 1949. NATO was created to deter Soviet aggression in Europe.
Eastern Europe
* Truman Doctrine: The Truman Doctrine was a policy of the United States to provide economic and military aid to countries threatened by communism. This policy was applied in Eastern Europe to prevent the spread of communism in the region.
* Yalta Conference: The Yalta Conference was a meeting between the leaders of the United States, the Soviet Union, and the United Kingdom in 1945. At the conference, the Allies agreed to divide Eastern Europe into spheres of influence. The Soviet Union gained control of most of Eastern Europe, while the United States gained control of Greece and Turkey.
Asia
* Korean War: The Korean War was a conflict between North Korea and South Korea from 1950 to 1953. The United States intervened in the war to prevent North Korea from taking over South Korea.
* Vietnam War: The Vietnam War was a conflict between North Vietnam and South Vietnam from 1954 to 1975. The United States intervened in the war to prevent North Vietnam from taking over South Vietnam.
* Afghanistan: The Soviet Union invaded Afghanistan in 1979. The United States responded by providing military and financial aid to the Afghan resistance movement.
Latin America
* Cuban Missile Crisis: The Cuban Missile Crisis was a confrontation between the United States and the Soviet Union over the Soviet Union's decision to place nuclear missiles in Cuba in 1962. The United States blockaded Cuba and threatened to invade the island if the missiles were not removed. The Soviet Union eventually agreed to remove the missiles.
* Chilean Coup: The United States supported the military coup that overthrew Chilean President Salvador Allende in 1973. The coup led to a dictatorship that lasted for 17 years.
* Contragate: The Contragate scandal was a political scandal in the United States in the 1980s. The scandal involved the illegal sale of arms to Iran and the use of the proceeds to fund the Contras, a rebel group fighting against the government of Nicaragua.