President Harry S Truman, and political and military representatives at the Potsdam Conference, 1945

The Potsdam Conference, 17 Jul 1945-2 Aug 1945, was the meeting of the principal Allies of World War Two, the United States, the Union of Soviet Socialist Republics and Great Britain, to clarify and implement agreements reached previously at the Yalta Conference, 4-11 Feb 1945. The chief representatives were US President Harry S Truman, Soviet Premier Joseph Vissarionovich Stalin, British Prime Minister Rt Hon Winston (Leonard Spencer) Churchill and, after Churchill's defeat in the British general elections, Rt Hon Clement Richard Attlee. The representatives agreed to transfer the chief authority in Germany to the American, British, Soviet, and French military commanders in their respective zones of occupation and to a four-power Allied Control Council for matters regarding the whole of Germany. The Allies set up a new system of rule for Germany which outlawed the Nazi Party, disarmed Germany, and introduced representative and elective principles of government. The German economy was to be decentralised, and monopolies dismantled. The question of Polish sovereignty was discussed, and all former German territory east of the Oder and Neisse rivers was transferred to Polish and Soviet administration, pending a final peace treaty. The German population in these territories was to be transferred to Germany and a mode of reparations payments was outlined.. Finally, the Potsdam Declaration, 26 Jul 1945, presented an ultimatum to Japan, offering the nation the choice between unconditional surrender and total destruction. The material in this collection contains President Harry S Truman's diary and official papers relating to the Potsdam Conference, 29 Mar-2 Aug 1945.