Frankly, because FDR was so ill and unfit to lead by 1945 that Josef Stalin had no problems simply bullying his way into a position of power. read more
Nothing was given to Russia by Roosevelt, Truman, Churchill and co. Russia itself, known as the Soviet Union then, seized control over what the Germans had conquered. Stalin took whatever territory his armies marched through while pushing back the German armies and installed his troupe of ideological followers there as puppets. read more