The Tehran Conference (codenamed Eureka) was the meeting of Joseph Stalin

Joseph Stalin

Joseph Vissarionovich Stalin was the Premier of the Soviet Union from 6 May 1941 to 5 March 1953. He was among the Bolshevik revolutionaries who brought about the October Revolution and had held the position of first General Secretary of the Communist Party of the Soviet Union's Central Committee...

, Franklin D. Roosevelt and Winston Churchill

Winston Churchill

Sir Winston Leonard Spencer-Churchill, was a predominantly Conservative British politician and statesman known for his leadership of the United Kingdom during the Second World War. He is widely regarded as one of the greatest wartime leaders of the century and served as Prime Minister twice...

 between November 28 and December 1, 1943, most of which was held at the Soviet Embassy in Tehran

Tehran

Tehran , sometimes spelled Teheran, is the capital of Iran and Tehran Province. With an estimated population of 8,429,807; it is also Iran's largest urban area and city, one of the largest cities in Western Asia, and is the world's 19th largest city.In the 20th century, Tehran was subject to...

, Iran

Pahlavi dynasty

The Pahlavi dynasty consisted of two Iranian/Persian monarchs, father and son Reza Shah Pahlavi and Mohammad Reza Shah Pahlavi The Pahlavi dynasty consisted of two Iranian/Persian monarchs, father and son Reza Shah Pahlavi (reg. 1925–1941) and Mohammad Reza Shah Pahlavi The Pahlavi dynasty ...

. It was the first World War II conference amongst the Big Three

Allies of World War II

The Allies of World War II were the countries that opposed the Axis powers during the Second World War . Former Axis states contributing to the Allied victory are not considered Allied states...

 (the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

, the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, and the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

) in which Stalin was present. It almost immediately followed the Cairo Conference

Cairo Conference

The Cairo Conference of November 22–26, 1943, held in Cairo, Egypt, addressed the Allied position against Japan during World War II and made decisions about postwar Asia...

 (November 22–26, 1943) and preceded both the Yalta Conference

Yalta Conference

The Yalta Conference, sometimes called the Crimea Conference and codenamed the Argonaut Conference, held February 4–11, 1945, was the wartime meeting of the heads of government of the United States, the United Kingdom, and the Soviet Union, represented by President Franklin D...

 (February 4–11, 1945) and the Potsdam Conference

Potsdam Conference

The Potsdam Conference was held at Cecilienhof, the home of Crown Prince Wilhelm Hohenzollern, in Potsdam, occupied Germany, from 16 July to 2 August 1945. Participants were the Soviet Union, the United Kingdom, and the United States...

 (July 17 - August 2, 1945).