The document summarizes key events in the Cold War between the Soviet Union and the United States from 1945 to 1989. It describes how the US helped rebuild Western Europe through the Marshall Plan to prevent communist takeover after WWII. It also discusses the rise of communist China and subsequent proxy wars in Korea and Vietnam between the two superpowers. The document outlines periods of increased tensions like the Cuban Missile Crisis and periods of détente. It concludes with the fall of the Berlin Wall and collapse of the Soviet Union, marking the end of the Cold War.