Big Three

The Big Three conferences decided the strategy of the war and the shape of the post-war world, including Poland's, without its government taking part. At Tehran (28 November – 1 December 1943) they agreed on the invasion of France and, provisionally, on Poland's eastern frontier on the Curzon Line. At Yalta (4–11 February 1945) they adopted that frontier, the division of Germany into occupation zones and a formula for a Polish government based on the Lublin committee. At Potsdam (17 July – 2 August 1945) Stalin met Truman and Churchill, replaced mid-conference by Attlee; among other things they set Poland's western border on the Oder and Lusatian Neisse.

The same name is sometimes given to the leaders of the United States, Britain and France, Wilson, Lloyd George and Clemenceau, at the Paris Peace Conference of 1919.