Who was the United States’ main rival during the Cold War?

Why this is the answer

After World War II, the United States and the Soviet Union became the two main superpowers. They had opposite political and economic systems, so they competed for influence around the world. That long competition was the Cold War, so the main rival was the Soviet Union (USSR/Russia).

💡 Memory tip: Remember: Cold War = U.S. against the Soviet Union (USSR).