USCIS 128:109. During the Cold War, what was one main concern of the United States?

OpenAI. (2026). During the Cold War, what was one main concern of the United States?    [AI-generated infographic]. OpenAI.  Edited by Jennifer Gagliardi

During the Cold War, one main concern of the United States was the spread of communism. Another major concern was the danger of nuclear war and the spread, or proliferation, of nuclear weapons to more countries.

After World War II ended in 1945, the United States and the Soviet Union (USSR) became rivals. The United States supported democracy and capitalism, while the Soviet Union supported communism and one-party communist governments.

As the Cold War began, American leaders worried that communism would spread to other countries. Several countries in Eastern Europe became communist governments connected to the Soviet Union. China also became communist in 1949.

Because of these events, the United States tried to stop the spread of communism. This policy was called containment. The United States gave military and economic aid to countries that resisted communist influence.

The fear of communism affected many parts of American life during the late 1940s and 1950s. Some Americans worried that communist spies had entered the government, universities, or entertainment industries.

At the same time, the United States and the Soviet Union built large numbers of nuclear weapons. This competition became known as the arms race.

Nuclear weapons were much more powerful than ordinary bombs. Many people feared that a nuclear war could destroy entire cities and kill millions of people.

During the Cold War, schools sometimes practiced “duck and cover” drills to prepare for possible nuclear attacks. Some families built bomb shelters near their homes because they feared nuclear war.

One of the most dangerous moments of the Cold War was the Cuban Missile Crisis in 1962. The Soviet Union placed nuclear missiles in Cuba, close to the United States. President John F. Kennedy demanded that the missiles be removed.

For several days, the world feared that the United States and the Soviet Union might begin a nuclear war. Eventually, the Soviet Union agreed to remove the missiles, and the crisis ended peacefully.

As more countries developed nuclear weapons, leaders became concerned about the spread, or proliferation, of nuclear weapons. They feared that nuclear weapons could spread to many countries and increase the risk of war or accidents.

Because of these fears, some countries signed agreements to limit nuclear weapons and reduce tensions. One important agreement was the Nuclear Non-Proliferation Treaty (NPT) in 1968, which tried to stop the spread of nuclear weapons to additional countries.

The Cold War lasted until 1991, when the Soviet Union dissolved. The end of the Cold War reduced tensions between the two countries.

The Cold War is important because fear of communism, nuclear war, and the spread of nuclear weapons shaped American politics, military policy, science, education, and international relations for many decades.