Which 1943 conference among Allied leaders laid groundwork for postwar diplomacy and European borders?

• A. Tehran Conference
• B. Casablanca Conference
• C. Potsdam Conference
• D. Yalta Conference

Answer: (A)

This question tests understanding of how an early wartime meeting helped start the planning for the postwar world. At the Tehran Conference, the leaders of the United States, Britain, and the Soviet Union met for the first time in a Big Three setting. They moved beyond immediate military aims to lay the groundwork for what would come after the war. Key outcomes included agreeing to open a second front in Western Europe to hasten victory, and committing to cooperate against Japan after Germany’s defeat. More importantly, they began outlining a framework for postwar diplomacy, including the idea of an international organization to maintain peace. This set the tone for how Europe would be reorganized and governed in the aftermath, even though specific borders and governments would be settled more fully in later conferences.

Casablanca focused on wartime strategy and unconditional surrender and doesn’t emphasize postwar diplomacy. The later conferences, Yalta and Potsdam, dealt more directly with the specifics of postwar borders and governance.