Potsdam Conference Opens: Allies Decide Germany's Fate

Three leaders who barely trusted each other sat down in a German palace to divide a continent, and the decisions they made over seventeen days shaped the Cold War before it had a name. The Potsdam Conference opened on July 17, 1945, at Cecilienhof Palace outside Berlin, with Harry Truman, Winston Churchill, and Joseph Stalin negotiating the postwar settlement for Europe while the rubble of Hitler's capital smoldered a few miles away. Truman had been president for barely three months, and he arrived carrying a secret that changed his negotiating calculus: the Trinity nuclear test had succeeded the morning the conference opened. The agenda was enormous. Germany had surrendered unconditionally on May 8, and the victors had to determine occupation zones, reparations, denazification procedures, territorial adjustments, and the political future of liberated Eastern Europe. The "Big Three" had agreed on broad outlines at Yalta in February 1945, but implementation revealed deep conflicts. Stalin wanted maximum reparations to rebuild the devastated Soviet Union. Truman and Churchill wanted a reconstructed Germany that could stabilize Western Europe. Poland's borders needed redrawing, and millions of ethnic Germans would need to be expelled from territories transferred to Poland and Czechoslovakia. Churchill left the conference midway through and did not return. The British general election of July 26 produced a Labour landslide, and Clement Attlee replaced Churchill at the negotiating table. Truman casually mentioned to Stalin on July 24 that the United States possessed "a new weapon of unusual destructive force." Stalin, whose spies had kept him informed about the Manhattan Project for years, replied that he hoped America would make good use of it. Both men understood the subtext. The Potsdam Agreement divided Germany into four occupation zones, established the framework for war crimes trials at Nuremberg, and authorized the "orderly transfer" of German populations from Poland, Czechoslovakia, and Hungary. The conference also issued the Potsdam Declaration demanding Japan's unconditional surrender, warning of "prompt and utter destruction" without specifying the atomic bomb. Japan rejected the ultimatum. Hiroshima was bombed eleven days later. The optimistic language of Allied cooperation at Potsdam masked the emerging reality: the United States and Soviet Union were already competing for influence across the globe, and the wartime alliance would not survive the peace.