The Berlin Blockade, which lasted from 1948 to 1949, was a major crisis in which the Soviet Union blocked access to West Berlin by land and air, leading to a standoff between the Western Allies and the Soviet Union.

The Truman Doctrine, announced in 1947, was a policy of the United States to provide economic and military aid to countries threatened by communism.

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

The Strategic Arms Limitation Treaty (SALT I) was signed in 1972 and aimed to limit the number of strategic nuclear weapons possessed by the United States and the Soviet Union.

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

Project Apollo was the U.S. space program that landed the first humans on the moon in 1969.

The Cuban Missile Crisis in 1962 was a tense standoff between the United States and the Soviet Union over the Soviet deployment of nuclear missiles in Cuba.

Richard Nixon initiated the policy of détente with the Soviet Union in the early 1970s, aiming to reduce tensions and improve relations between the two superpowers.

The Saur Revolution in 1978 led to the overthrow of the Afghan government and the establishment of a pro-Soviet regime, prompting the Soviet invasion of Afghanistan.

Ronald Reagan launched the Strategic Defense Initiative (SDI) in 1983, aiming to develop a missile defense system to protect the United States from nuclear attack.

The fall of the Berlin Wall in 1989 was a symbolic and significant event that marked the beginning of the end of the Cold War.

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

The United States was the first country to develop a hydrogen bomb, detonating it in 1952.

Lyndon B. Johnson signed the Nuclear Non-Proliferation Treaty (NPT) in 1968, aiming to prevent the spread of nuclear weapons.

The dissolution of the Warsaw Pact in 1991, a military alliance of Eastern European countries led by the Soviet Union, was a major factor in the collapse of the Soviet Union.