1945 Meeting with US president FDR, British Prime Minister(PM) Winston Churchill, and and Soviet Leader Stalin during WWII to plan for post-war////The final wartime meeting of the leaders of the United States, Britain, and the Soviet Union was held at Potsdamn, outside Berlin, in July, 1945. Truman, Churchill, and Stalin discussed the future of Europe but their failure to reach meaningful agreements soon led to the onset of the Cold War.