The document summarizes the major World War II conferences between Stalin, FDR, and Churchill that determined the postwar occupation of Germany and influence in Eastern Europe. At Yalta, it was decided Germany would be divided into occupation zones and Stalin would declare war on Japan. However, at Potsdam, Stalin refused to allow free elections in Eastern Europe as agreed and installed pro-Soviet governments in countries like Poland. This led to Eastern Europe falling under Soviet control and the emergence of the Iron Curtain dividing Europe politically and ideologically for the duration of the Cold War.