What was the conflict between the United States and the Soviet Union that caused the Cold War?

The Cold War was an ongoing political rivalry between the United States and the Soviet Union and their respective allies that developed after World War II. This hostility between the two superpowers was first given its name by George Orwell in an article published in 1945

The Cold War is centered on the fact that the United States and the Western powers felt threatened by the Soviet's expansionist's policy.