World War II by country

This is a list of all the participants of the Second World War on both the allied and axis side.

Go on to the World War II Wikipedia page and you will find that it will only list the Allies and Axis as combatants and only list the main allied and axis leaders.

before you see the list.

the main countries are in Bold
the list starts in 1937 and not 1939

Allies

1937

China (from July 1937)

1939

Poland (from September 1939)

Polish Partisans

France (from September 1939)^[1]

FTR (until 1940)
Free France (from 1940-1944)
- Free French Forces
PGFR (from 1944)
Algeria
Morocco
Tunisia
Syria
Fr. Somaliland
Lebanon
French Indochina
Fr. Guiana
Madagascar
French partisans
Libya^[2]
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
Gibraltar
Hong Kong
Tonga
Nigeria
Malta
Ceylon
Libya^[3]
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)

Oman (from September 1939)

1940

Denmark (9 April 1940)

Norway (from April 1940)

Luxembourg (from May 1940)

Netherlands (from May 1940)

Belgium (from May 1940)

Greece (from October 1940)

Greek partisans

1941

Yugoslavia (from April 1941)^[4]

Yugoslav Partisans
Democratic Federal Yugoslavia (from November 1943)
Provisional Government (from March 1945)

Viet Minh (from May 1941)^[5]

Union of Soviet Socialist Republics (from June 1941)^[6]

Russia
Ukraine
Belarus
Provisional National Government (from December 1944)
Polish People's Army
- Polish Army in the East
Polish Committee of National Liberation (from July 1944 - December 1944)
Provisional Government of the Republic of Poland (from December 1944 - June 1945)
Provisional Government of National Unity (from June 1945)
Soviet partisans
Soviet-occupied Germany and Austria (from June 1945)
Mongolia (from August 1945)

Ethiopia (from November 1941)

Panama (from December 1941)

United States (from December 1941)

Commonwealth of the Philippines
Guam
Puerto Rico
Greenland (taken after the German invasion of Denmark)
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)

Provisional governments or governments-in exile that declared war against the Axis in 1941

Provisional Government of the Republic of Korea (from December 1941)

Czechoslovakia (government-in-exile) (from December 1941)

Czechoslovak Partisans

1942

Mexico (from May 1942)

Brazil (from August 1942)

1943

Iraq (from January 1943)

Bolivia (from April 1943)

Italy (from September 1943)^[7]

Italian partisans

Iran (From September 1943)^[8]

Colombia (from November 1943)

1944

Liberia (from January 1944)

Romania (from August 1944)^[9]

Bulgaria (from September 1944)^[10]

Finland (from September 1944)^[11]

Albania (from October 1944)

Albanian partisans

1945

Ecuador (from February 1945)

Paraguay (from February 1945)

Peru (from February 1945)

Uruguay (from February 1945)

Venezuela (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)

Axis

1937

Japan (from July 1937)

Manchukuo (1931-1945)
East Hebei Autonomous Government (1935-1938)
Provisional Government of the Republic of China (1937-1940)
Mengjiang (1939-1941)
Recognised National Government of China (1940-1945)
State of Burma (1943-1945)
Azad Hind (1943-1945)
Second Philippine Republic (1943-1945)
Vietnam (Empire of Vietnam) (1945)

1939

Germany (from September 1939-May 1945)

Slovakia (1939-1945)
Quisling Regime (1940-1945)
French State (1940-1942/1944)^[12]^[13]
Croatia (1941-1945)
Italian Social Republic (1943-1945)
Albania (1943-1944)
Montenegro (1943-1944)
Hungary (1944-1945)^[14]

1940

Italy (from June 1940-September 1943)^[15]

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

Hungary (from November 1940)^[16]

Romania (from November 1940-August 1944)^[17]

1941

Bulgaria (from March 1941-September 1944)^[18]

Yugoslavia (25 - 27 March 1941)^[19]

Iraq (2 - 31 May 1941)

Finland (from June 1941-September 1944)^[20]^[21]

Thailand (from December 1941)

Neutral

Switzerland

Lithuania (annexed by the USSR in 1940)

Latvia (annexed by the USSR in 1940)

Estonia (annexed by the USSR in 1940)

Ireland

Spain^[22]

Portugal

Angola
Mozambique
Timor (invaded by the Japanese in 1942)
Goa

Tuva (Soviet satellite state, annexed by the USSR in 1944)

Xinjiang (annexed by China in 1944)^[24]

East Turkestan^[25]

References

↑ When France fell to Germany, almost all of the french colonies became colonies to the puppet state Vichy France. All the colonies were liberated by the allies from 1940-1943 (except for French Indochina who was invaded by Japan in 1940).
↑ Occupied by the french from 1942 to 1951.
↑ Occupied by the British from 1942 to 1951.
↑ Joined the allies due to a coup against the axis and formed an allied government (and then being invaded by the axis the next month).
↑ Democratic Republic of Vietnam declared on 2 September 1945 (the same day World War II ended).
↑ Before Operation Barbarossa in 1941, the Soviets invaded Poland in 1939. 2 weeks after Germany invaded. Then the Soviets invaded Finland a few months later (but they didn’t annex all of Finland).
↑ Joined the allies due to the allied invasion that month. A few months earlier Mussolini was deposed from power. Italy signed peace with the allies and formed in allied government (and going under allied occupation).
↑ At this point Iran was occupied by the allies after an allied invasion in 1941 to protect the supply line that went through Iran.
↑ Joined the allies due to the Soviet operation in august. With Ion Antonescu (the leader of Romania) being arrested and Romania forming an allied government (and going under Soviet occupation).
↑ Joined the allies due to the soviet invasion in September. With a coup by the Bulgarian resistance and Bulgaria forming an allied government (and going under Soviet occupation).
↑ Joined the allies due a soviet operation that had been going on for months.
↑ During operation torch, (the allied invasion of french North Africa) the axis invaded Vichy France. But Pétain stayed in power until 1944 when France was liberated by the allies.
↑ When France fell to Germany, almost all of the french colonies became colonies to the puppet state Vichy France. All the colonies were liberated by the allies from 1940-1943 (except for French Indochina who was invaded by Japan in 1940).
↑ Hungary became a German puppet state in 1944 after a pro axis coup (Operation Panzerfaust).
↑ Joined the allies due to the allied invasion that month. A few months earlier Mussolini was deposed from power. Italy signed peace with the allies and formed in allied government (and going under allied occupation).
↑ Hungary became a German puppet state in 1944 after a pro axis coup (Operation Panzerfaust).
↑ Joined the allies due to the Soviet operation in august. With Ion Antonescu (the leader of Romania) being arrested and Romania forming an allied government (and going under Soviet occupation).
↑ Joined the allies due to the soviet invasion in September. With a coup by the Bulgarian resistance and Bulgaria forming an allied government (and going under Soviet occupation).
↑ Joined the allies due to a coup against the axis and formed an allied government (and then being invaded by the axis the next month).
↑ Before Operation Barbarossa in 1941, Finland was involved in the Winter War with the Soviets in 1939 and lost some land to them. And Finland was never officially part of the axis powers.
↑ Joined the allies due a soviet operation that had been going on for months.
↑ See Blue Division [en]
↑ After Denmark fell in 1940, the allies occupied Iceland and in 1944 Iceland gained independence from Denmark.
↑ In 1937, Xinjiang won independence from china after the Soviets invaded.
↑ The Soviets supplied rebel forces after xinjiang was annexed back into china.

[1] When France fell to Germany, almost all of the french colonies became colonies to the puppet state Vichy France. All the colonies were liberated by the allies from 1940-1943 (except for French Indochina who was invaded by Japan in 1940).

[2] Occupied by the french from 1942 to 1951.

[3] Occupied by the British from 1942 to 1951.

[4] Joined the allies due to a coup against the axis and formed an allied government (and then being invaded by the axis the next month).

[5] Democratic Republic of Vietnam declared on 2 September 1945 (the same day World War II ended).

[6] Before Operation Barbarossa in 1941, the Soviets invaded Poland in 1939. 2 weeks after Germany invaded. Then the Soviets invaded Finland a few months later (but they didn’t annex all of Finland).

[7] Joined the allies due to the allied invasion that month. A few months earlier Mussolini was deposed from power. Italy signed peace with the allies and formed in allied government (and going under allied occupation).

[8] At this point Iran was occupied by the allies after an allied invasion in 1941 to protect the supply line that went through Iran.

[9] Joined the allies due to the Soviet operation in august. With Ion Antonescu (the leader of Romania) being arrested and Romania forming an allied government (and going under Soviet occupation).

[10] Joined the allies due to the soviet invasion in September. With a coup by the Bulgarian resistance and Bulgaria forming an allied government (and going under Soviet occupation).

[11] Joined the allies due a soviet operation that had been going on for months.

[12] During operation torch, (the allied invasion of french North Africa) the axis invaded Vichy France. But Pétain stayed in power until 1944 when France was liberated by the allies.

[13] When France fell to Germany, almost all of the french colonies became colonies to the puppet state Vichy France. All the colonies were liberated by the allies from 1940-1943 (except for French Indochina who was invaded by Japan in 1940).

[14] Hungary became a German puppet state in 1944 after a pro axis coup (Operation Panzerfaust).

[15] Joined the allies due to the allied invasion that month. A few months earlier Mussolini was deposed from power. Italy signed peace with the allies and formed in allied government (and going under allied occupation).

[16] Hungary became a German puppet state in 1944 after a pro axis coup (Operation Panzerfaust).

[17] Joined the allies due to the Soviet operation in august. With Ion Antonescu (the leader of Romania) being arrested and Romania forming an allied government (and going under Soviet occupation).

[18] Joined the allies due to the soviet invasion in September. With a coup by the Bulgarian resistance and Bulgaria forming an allied government (and going under Soviet occupation).

[19] Joined the allies due to a coup against the axis and formed an allied government (and then being invaded by the axis the next month).

[20] Before Operation Barbarossa in 1941, Finland was involved in the Winter War with the Soviets in 1939 and lost some land to them. And Finland was never officially part of the axis powers.

[21] Joined the allies due a soviet operation that had been going on for months.

[22] See Blue Division [en]

[23] After Denmark fell in 1940, the allies occupied Iceland and in 1944 Iceland gained independence from Denmark.

[24] In 1937, Xinjiang won independence from china after the Soviets invaded.

[25] The Soviets supplied rebel forces after xinjiang was annexed back into china.

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