Why dd the United States and the Soviets end up on opposite sides of the Cold War?
The Soviet union wanted to establish a world wide communistic utopian government. The United States wanted to spread western style democracy across the world.
The visions of what would be best for the world between the Soviet Union and the United States were diametrically opposed.
The Soviet Union strived for world dominance similar to its control of the previously independent countries of Eastern Europe.
The United States opposed the spread of communism. By establishing NATO the United States and the Soviet Union were on opposite sides of the cold war.