HT: 1943- World War II : Tehran Conference : U.S. President Franklin D. Roosevelt , British Prime Minister Winston Churchill and Soviet Premier Joseph Stalin met in Tehran, Iran , to discuss war strategy. Tehran Conference The "Big Three" at the Tehran Conference Left to right: Joseph Stalin, Franklin D. Roosevelt and Winston Churchill. The Tehran Conference ( codenamed Eureka ) was a strategy meeting of Joseph Stalin , Franklin D. Roosevelt , and Winston Churchill from 28 November to 1 December 1943, after the Anglo-Soviet Invasion of Iran . It was held in the Soviet Union 's embassy in Tehran , Iran . It was the first of the World War II conferences of the "Big Three" Allied leaders (the Soviet Union , the United States , and the United Kingdom ). It closely followed the Cairo Conference which had taken place on 22–26 November 1943, and preceded the 1945 Yalta and Potsdam conferences. Although the three leaders arr
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