United States. Franklin Delano Roosevelt, President. General Dwight D. Eisenhower, Supreme Commander.
Great Britain. King George VI. Winston Churchill, Prime Minister. General Bernard Montgomery, commander of British forces. Also included: Canada, Australia, New Zealand, India, Union of South Africa, Cyprus and others.
Soviet Union. Joseph Stalin.
China. Generalissimo Chiang Kai-shek
France. President Albert Lebrun (until 1940). General Charles De Gaulle, Free French Forces.
Poland. President Ignacy Mościcki.
Brazil. President Getúlio Vargas
Yugoslavia. Josip Tito.
Other Allied participants included Norway, the Netherlands, Mexico, Greece, Ethiopia, Czechoslavakia, and Belgium.
Germany. Chancellor Adolph Hitler.
Italy. Dictator Benito Mussiolini.
Japan. Emperor Hirohito
Other participants included Hungary, Romania, Bulgaria, Finland, Iraq, Thailand, San Marino, Yugoslavia; there were also many Japanese, German and Italian "puppet" states involved.