It all started when the U.S joined the Second World War. All three, Stalin, Churchill and Roosevelt were together to stop Hitler. Although Russia and the U.S were not the best of friends, they worked together to stop the Nazis.
Bombing in Nagasaki , U.S first atomic bomb (shows U.S dominance over other countries such as Russia)
After the war finished, discussions on how to rule Germany arises. The U.S, Britain and France rule one half of Germany and Berlin with capitalism and Russia with communism. COMMUNISM AND DEMOCRACY DO NOT GO WELL TOGETHER
Berlin Blockade: 1948-1949
We need a man on the moon. The Soviet Union has a satellite in orbit!
Under Gorbachev countries under communist rule began to revolt against communist and he couldn't control what the S.U had.