During the Cold War, what was one main concern of the United States?

After World War II, the United States and the Soviet Union became rivals, and the Soviet Union promoted communism. U.S. leaders worried that communism would spread to other countries and threaten democracy and free markets. This fear shaped many U.S. foreign and military policies during the Cold War.

After World War II, the United States and the Soviet Union became rival superpowers, and both built large nuclear arsenals. Many Americans feared a nuclear attack and practiced “duck and cover” drills while the government worked on deterrence and arms control to prevent a catastrophic war.