The Big Three refers to U.S. President Franklin Roosevelt, British Prime Minister Winston Churchill and Soviet Union leader Joseph Stalin. They met for the first time at the Tehran Conference in 1943 to strategize about World War II.
The three leaders confirmed plans to invade Germany on multiple fronts during their first meeting and an invasion of Japan six months later. They also agreed to recognize Iran’s sovereignty. Later meetings solidified post-war plans with the international community. The group granted territories to the Soviet Union and agreed to possible occupation of Germany. Little was accomplished during the group’s last meeting in 1945, because the men had become suspicious of one another.