The Allied leaders who met to settle Europe weren't even the same leaders by the end

In July 1945, the Allies met outside Berlin at Potsdam to decide Germany's occupation zones, but the meeting was upended mid-session when Churchill lost a home election and was replaced by his successor, Clement Attlee. Truman, new to office after Roosevelt's death, used it to hint to Stalin that the US now had a devastating weapon, soon used on Hiroshima and Nagasaki. Disagreements there over Soviet intentions in Eastern Europe are often marked as an early sign of the coming Cold War.

— Protocol of the Proceedings, Potsdam Conference, Potsdam Conference — 17 July - 2 August 1945