The Containment Policy was a strategy developed by the United States to prevent the spread of communism beyond its existing borders.

The Iron Curtain Speech, delivered by Winston Churchill in 1946, is widely considered to mark the beginning of the Cold War.

The North Atlantic Treaty Organization (NATO) was formed in 1949 as a collective defense alliance among North American and European countries.

The Soviet Union launched Sputnik 1, the first artificial satellite, in 1957, sparking the Space Race.

Fidel Castro led the Cuban Revolution and aligned Cuba with the Soviet Union during the Cold War.

The Bay of Pigs Invasion, a failed attempt by the United States to overthrow Fidel Castro's government, led to the Cuban Missile Crisis.

The Brezhnev Doctrine, named after Soviet leader Leonid Brezhnev, was a policy of intervention in Eastern Bloc countries to maintain communist control.

The fall of the Berlin Wall in 1989 is widely considered to mark the end of the Cold War.

Mikhail Gorbachev introduced Perestroika (economic restructuring) and Glasnost (openness) in an attempt to reform the Soviet Union.

The fall of the Berlin Wall in 1989 paved the way for the reunification of Germany in 1990.

The Intermediate-Range Nuclear Forces (INF) Treaty was signed in 1987 to eliminate intermediate-range nuclear missiles.

Czechoslovakia experienced the Velvet Revolution in 1989, leading to the overthrow of the communist government.

The Reagan Doctrine was a policy of providing military and financial aid to anti-communist movements around the world.

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