In February 1945 , as a member of the U.S. delegation headed by Stettinius , Hiss attended the Yalta Conference , where the Big Three , Franklin D. Roosevelt , Joseph Stalin , and Winston Churchill , met to consolidate their alliance to forestall any possibility , now that the Soviets had entered German territory , that any of them might make a separate peace with the Nazi regime . Negotiations addressed the postwar division of Europe and configuration of its borders ; reparations and de-Nazification ; and the still unfinished plans , carried over from Dumbarton Oaks , for the United Nations . Before the conference took place Hiss participated in the meetings where the American draft of the " Declaration of Liberated Europe " was created . The Declaration concerned the political future of Eastern Europe and critics on the right later charged that it made damaging concessions to the Soviets
Yalta Conference
Yalta Conference
Alger Hiss