The Tehran Conference was a meeting of the “Big Three” Allied leaders during World War II. It was held in Tehran, Iran, from November 28 to December 1, 1943. The leaders present were U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Soviet Premier Joseph Stalin.

The Tehran Conference was the first time the three leaders had met in person and was a major step in the Allies’ plans for the end of World War II. Here are some key points about the Tehran Conference:

• The main purpose of the Tehran Conference was to discuss the plans for the Allied invasion of Europe, which was code-named Operation Overlord.
• The leaders agreed to launch the invasion in May 1944 and to open a second front in the east against Germany.
• The leaders also discussed the post-war reorganization of Europe, including the division of Germany into four occupation zones.
• The leaders also discussed the future of Poland and the possibility of a Polish government-in-exile.
• The Tehran Conference also saw the signing of the Tripartite Pact, which was an agreement between the three Allied powers to cooperate in the reconstruction of Europe after the war.
• The Tehran Conference was a major step in the Allied war effort and helped to ensure the success of the D-Day invasion in June 1944.