The Truman Doctrine was a policy of containment that the United States adopted to prevent the spread of communism. It was announced by President Harry S. Truman in 1947.

The Marshall Plan was a plan that the United States implemented to provide economic aid to Western Europe after World War II. It was named after Secretary of State George Marshall.

The Cold War was a period of tension between the United States and the Soviet Union that lasted from the end of World War II to the early 1990s.

The Berlin Wall was a wall that was built by the Soviet Union to divide East and West Berlin.

Nikita Khrushchev was the Soviet leader who was in power during the Cuban Missile Crisis.

John F. Kennedy was the American president who was in power during the Cuban Missile Crisis.

The Strategic Arms Limitation Treaty (SALT I) was an agreement that was reached between the United States and the Soviet Union to limit the number of nuclear weapons that each country could possess.

The Anti-Ballistic Missile Treaty (ABM Treaty) was an agreement that was reached between the United States and the Soviet Union to limit the development and deployment of anti-ballistic missile systems.

The Intermediate-Range Nuclear Forces Treaty (INF Treaty) was an agreement that was reached between the United States and the Soviet Union to eliminate all intermediate-range nuclear missiles.

Mikhail Gorbachev was the Soviet leader who was in power during the collapse of the Soviet Union.

Perestroika, glasnost, and democratization were all policies of economic and political reform that were implemented by Mikhail Gorbachev.

The fall of the Berlin Wall in 1989 marked the end of the Cold War.

The dissolution of the Soviet Union in 1991 marked the end of the Cold War.

The signing of the INF Treaty in 1987 marked the end of the Cold War.

The end of the Vietnam War in 1975 marked the end of the Cold War.