Yalta was the second of three major wartime conferences among the Big Three . It was preceded by the Tehran Conference in November 1943 , and was followed by the Potsdam Conference in July 1945 . It was also preceded by a conference in Moscow in October 1944 , not attended by President Roosevelt , in which Churchill and Stalin had carved up Europe into Western and Soviet spheres of influence . The Potsdam Conference was to be attended by Stalin , Churchill ( who was replaced halfway through by the newly elected British prime minister Clement Attlee ) and Harry S. Truman , Roosevelt 's successor after his death
Potsdam Conference
Potsdam Conference
Yalta Conference