The Big Three responsible for developing an Allied strategy during World War II were Prime Minister of Great Britain Winston Churchill, President of the United States Franklin D. Roosevelt and Premeir of the Soviet Union Joseph Stalin. The Big Three received the name after their first meeting at Tehran.
The Big Three met only twice: first in Tehran, Iran and once in the Mediterranean in Yalta. While in Tehran, the Three developed plans to invade Normandy France, which would later be known as "D-Day." In the next meeting at Yalta, the Three discussed what should be done about Germany and the territories taken from the Nazis, as well as the demilitarization of the country. In both meetings, each party reaffirmed their belief in ending the war through unconditional surrender.