The document summarizes the origins and early events of the Cold War between the United States and Soviet Union. It discusses how tensions grew between the former World War 2 allies over the fate of liberated countries in Europe. This led to the USSR tightening control over Eastern Europe and installing communist governments, while the US sought to contain the spread of communism and support democratic states. The document outlines several early flashpoints like Iran, Turkey, and Greece, which demonstrated the emerging geopolitical rivalry that became the Cold War.