Tehran was a strategy meeting of Joseph Stalin, Franklin D. Roosevelt and Winston Churchill from 28 November to 1 December 1943.
It was held at the Embassy of the Soviet Union in Tehran, Iran. It was the first of the World War II conventions of the "Big Three" Allied leaders (the Soviet Union, the United States, and the United Kingdom).
The conference was to be held on 28 November 1943 at 16:00. Stalin arrived much earlier, followed by Roosevelt, in a wheelchair from his residence adjacent to the venue.
Roosevelt, who had traveled 7,000 miles (11,000 km) to participate and whose health was already deteriorating, met with Stalin. It was the first time they had met. Churchill, accompanied by his General Staff, arrived half an hour later, walking from his residence.
America and Great Britain wanted to secure the cooperation of the Soviet Union in defeating Germany. Stalin agreed, but at a cost: the U.S. And Britain would accept Soviet domination of Eastern Europe, support Yugoslav radicals, and agree to a westward shift of the border between Poland and the Soviet Union.