The document summarizes the major World War 2 conferences between Allied leaders from 1940 to 1945. It discusses the goals and outcomes of conferences such as the Atlantic Charter which laid out common aims, Casablanca where unconditional surrender of Germany was agreed on, Tehran where the Big Three (Churchill, FDR, Stalin) met for the first time, and Yalta where the division of Germany and plans for the United Nations were discussed. Potsdam dealt with restructuring Germany and trials for war criminals and finalized the occupation zones of Allied powers in Germany. The conferences showed the evolving goals from coordinating the war effort to planning for the postwar world.