Major Ally Powers

• United Kingdom, September 3, 1939

• Soviet Union, June 22, 1941

• United States of America, December 8, 1941

Minor Ally Powers

• Poland, September 1, 1939

• France, September 3, 1939

• Australia, September 3, 1939

• New Zealand, September 3, 1939

• Nepal, September 4, 1939

• Newfoundland, September 4, 1939

• Tonga, September 4, 1939

• South Africa, September 6, 1939

• Canada, September 10, 1939

• Denmark, April 9, 1940

• Norway, April 9, 1940

• Belgium, May 10, 1940

• Luxembourg, May 10, 1940

• Netherlands, May 10, 1940

• Free France, June 18, 1940

• Greece, October 28, 1940

• Kingdom of Yugoslavia, April 6, 1941

• Tannu Tuva, June 15, 1941

• Panama, December 7, 1941

• Philippines, December 7, 1941

• Costa Rica, December 8, 1941

• Dominican Republic, December 8, 1941

• El Salvador, December 8, 1941

• Haiti, December 8, 1941

• Honduras, December 8, 1941

• Nicaragua, December 8, 1941

• Republic of China, December 9, 1941

• Guatemala, December 9, 1941

• Cuba, December 9, 1941

• Provisional Government of the Republic of Korea, December 9, 1941 (Govt. in exile)

• Czechoslovakia, December 16, 1941 (Govt. in exile)

• Mexico, May 22, 1941

• Brazil, August 22, 1942

• Ethiopia, December 14, 1942

• Iraq, January 17, 1943

• Bolivia, April 7, 1943

• Iran, September 9, 1943

• Italy, October 13, 1943 (formerly a member of the Axis)

• Colombia, November 26, 1943

• Liberia, January 27, 1944

• Romania, August 25, 1944 (formerly a member of the Axis)

• Bulgaria, September 8, 1944 (formerly a member of the Axis)

• Finland, September 19, 1944 (formerly a member of the Axis)

• San Marino, September 21, 1944

• Albania, October 26, 1944 (formerly a member of the Axis)

• Hungary, January 20, 1945 (formerly a member of the Axis)

• Bahawalpur, February 2, 1945

• Ecuador, February 2, 1945

• Paraguay, February 7, 1945

• Peru, February 12, 1945

• Uruguay, February 15, 1945

• Venezuela, February 15, 1945

• Turkey, February 23, 1945

• Lebanon, February 27, 1945

• Saudi Arabia, March 1945

• Argentina, March 27, 1945

• Chile, April 11, 1945

• People's Republic of Mongolia, August 9, 1945