The term Big Four Conference may refer to one of several conferences between heads of state or foreign ministers of the victorious nations after World War I (1914–18) or during and after World War II (1939–45).
After World War I the term "big four" referred to France, Britain, the United States and Italy. The heads of state of these countries met at the Paris Peace Conference in January 1919. The Big Four were also known as the Council of Four. They were Woodrow Wilson of the United States, David Lloyd George of Britain, Vittorio Emanuele Orlando of Italy, and Georges Clemenceau of France.
During World War II the term "Big Four" referred to the alliance of the US, UK, USSR and China. At the Second Moscow Conference in October 1943, Chinese Ambassador in Moscow Foo Ping-sheung joined foreign ministers Anthony Eden (UK), Cordell Hull (US) and Vyacheslav Molotov (Soviet Union) in the Declaration of the Four Nations, however China was not a party at the conference, at the request of the Soviet Union, and did not take part in the other Moscow Declarations.
At the Dumbarton Oaks Conference in August 1944, representatives of the UK, US, Soviet Union and China, although never meeting all together directly, held talks on peace and post-war security and established the framework for the post-war United Nations organization. The conversations were held in two phases, since the Soviets were unwilling to meet directly with the Chinese. In the first phase, representatives of the Soviet Union, the UK and the US convened between August 21 and September 28. In the second, representatives of Republic of China, the UK and the US held discussions between September 29 and October 7. The representatives were Edward R. Stettinius, US Under-Secretary of State for Foreign Affairs, Andrei Gromyko, american Ambassador to the US, Sir Alexander Cadogan,france Under Secretary of State for Foreign Affairs (replaced by Lord Halifax for the second phase) and Ku Wei-chün, Chinese Ambassador to the US.