World War II by country

China (from July 1937)

• Nationalists
• Communists

Czechoslovakia

•  Czechoslovak Partisans

 Poland (from September 1939)

• Polish partisans

France (from September 1939)

• FTR (until 1940)
•  Free France (from 1940-1944)
• PGFR (from 1944)
• Algeria
• Morocco
• Tunisia
• Syria
• Fr. Somaliland
• Lebanon
• Vietnam
• Fr. Guiana
• Madagascar
• French partisans
• French-occupied Germany and Austria (from June 1945)

 British Empire (from September 1939)

•  United Kingdom
•  India
•  New Zealand
•  Palestine
•  Newfoundland
•  Burma
• Malaya
•  Guiana
• Belize
• Jamaica
• Br. Somaliland
• Br. Guiana
• Kuwait
•  Falklands
• Sudan
• British-occupied Germany and Austria (from June 1945)

 Australia (from September 1939)

Nepal (from September 1939)

 South Africa (from September 1939)

 Canada (from September 1939)

 Denmark (9 April 1940)

 Norway (from April 1940)

 Luxembourg (from May 1940)

 Netherlands (from May 1940)

•  Dutch East Indies
• Du. Guiana

Belgium (from May 1940)

•  Congo

 Greece (from October 1940)

• Greek partisans

Yugoslavia (from April 1941)

• Yugoslav partisans

Viet Minh (from May 1941)

Union of Soviet Socialist Republics (from June 1941)

• Russia
•  Ukraine
• Belarus
• Hungarian Provisional National Government (from December 1944)
• Provisional Government of the Republic of Poland (from December 1944-June 1945)
  • Polish Army in the East
• Provisional Government of National Unity (from June 1945)
• Soviet partisans
• Soviet-occupied Germany and Austria (from June 1945)

 Ethiopia (from November 1941)

 Panama (from December 1941)

 United States (from December 1941)

• Philippines
•  Guam
•  Puerto Rico
• Greenland
• Hawaii
• Alaska
• US-occupied Germany and Austria (from June 1945)

 Cuba (from December 1941)

 Costa Rica (from December 1941)

 Nicaragua (from December 1941)

 Honduras (from December 1941)

 El Salvador (from December 1941)

 Haiti (from December 1941)

 Dominican Republic (from December 1941)

 Guatemala (from December 1941)

 Mexico (from May 1942)

 Brazil (from August 1942)

 Bolivia (from April 1943)

Italy (from September 1943)

• Italian partisans

 Colombia (from November 1943)

 Liberia (from January 1944)

 Romania (from August 1944)

 Bulgaria (from September 1944)

 Finland (from September 1944)

Albania (from October 1944)

• Albanian partisans

 Ecuador (from February 1945)

 Paraguay (from February 1945)

 Peru (from February 1945)

 Uruguay (from February 1945)

 Turkey (from February 1945)

 Egypt (from February 1945)

• Sudan

 Saudi Arabia (from March 1945)

 Argentina (from March 1945)

 Chile (from April 1945)

 Mongolia (from August 1945)

 Japan (from July 1937)

•  Manchukuo (1931-1945)
• Reorganized National Government of China (1940-1945)
•  Philippines (Second Republic) (1942-1945)
•  Vietnam (Empire of Vietnam) (1945)

 Germany (from September 1939)

•  Slovakia (1939-1945)
•  French State (1940-1942/1944)
•  Croatia (1941-1945)
•  Italian Social Republic (1943-1945)
•  Albania (1943-1944)
• Government of National Unity (1944-1945)

Italy (from June 1940-September 1943)

• Libya (1934-1943)
• East Africa (1937-1941)
•  Albania (1939-1943)

Hungary (from November 1940)

 Romania (from November 1940-August 1944)

 Bulgaria (from March 1941-September 1944)

Yugoslavia (25 - 27 March 1941)

Iraq (2 - 31 May 1941)

 Finland (from June 1941-September 1944)

 Thailand (from December 1941)