The Tehran conference was a meeting that took place between November 28 and December 1, 1943, between the leaders Joseph Stalin, Winston Churchill and Franklin D. Roosevelt, who formed the Allied side. It constitutes one of the maximum exponents of cooperation of the allies in the Second World War.
It was the first conference between the three great ones (the Soviet Union, the United States, and the United Kingdom) in which Roosevelt was present, since he did not attend the Moscow conference, in August 1942. He succeeded the conference of Cairo and was followed by the Yalta conference and the Potsdam conference. The main debate focused on the opening of a second front in Western Europe.