The document provides an overview of key events and developments during the early Cold War period from 1945-1952, including:
1. The breakdown of the alliance between the US, Britain and the Soviet Union after WWII and rising tensions over Soviet expansion in Eastern Europe.
2. Truman's containment policy aimed at stopping the spread of communism and programs like the Truman Doctrine and Marshall Plan to provide aid to countries facing communist threats.
3. The Berlin Airlift and formation of NATO as responses to the Soviet blockade of West Berlin and military buildup in Europe.
4. The communist revolution in China, war in Korea, and US involvement in defending South Korea against North Korea and China.