The document summarizes key events and changes in the United States during and after World War II. It discusses the Yalta Conference where Stalin, Churchill and FDR met to decide the fate of Germany after the war. It also describes the Nuremberg Trials where Nazi leaders were tried for war crimes and the US occupation of Japan from 1945 to 1952 where the US helped reform Japan. Additionally, it outlines changes in the US economy and society during this period such as increased jobs, migration patterns, the GI Bill and racial tensions that erupted in riots.