The Yalta Conference saw Allied leaders agree that Germany would be divided into four occupation zones after defeat, that war criminals would be prosecuted, and that liberated countries could hold free elections. They disagreed over Poland's borders. The Potsdam Conference addressed postwar issues in Germany, including reparations, with disagreements between Stalin and the new US President Truman over Soviet influence in Eastern Europe. By 1946, Eastern European countries had communist governments loyal to Stalin behind an "Iron Curtain".