The document summarizes key aspects of the Cold War between the United States and Soviet Union after World War 2. It describes the ideological differences between democracy/capitalism in the West and communism in the East. It outlines the division of Germany and Berlin between Western allies and the Soviet Union. Key events that increased tensions are also summarized like the Berlin Blockade and Airlift, formation of NATO and Warsaw Pact alliances, and arms race including nuclear weapons and space race.