No, the Soviet Union was not part of NATO. NATO (North Atlantic Treaty Organization) is a political and military alliance formed by the United States, Canada, and several Western European countries in 1949 to defend against the perceived threat of Soviet expansion into Europe during the Cold War. The Soviet Union, on the other hand, was a socialist state that existed from 1922 to 1991 and was a rival superpower to the United States during the Cold War.
