World War II

Countries Involved in World War Two (WWII)

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Axis or Allies

Allies

Axis

Neutral

Axis or Allies

33
9
21
Country
Axis or Allies
WWII Time Line
China Flag
ChinaAlliesDecember, 1941
United States Flag
United StatesAlliesDecember 11. 1941
Brazil Flag
BrazilAlliesAugust 22, 1942
Russia Flag
RussiaAlliesJune 22, 1941
Ethiopia Flag
EthiopiaAlliesJuly, 1940
Mexico Flag
MexicoAlliesMay 22, 1942
Philippines Flag
PhilippinesAlliesDecember 8, 1941
Iran Flag
IranAllies
United Kingdom Flag
United KingdomAlliesSeptember 3, 1939
France Flag
FranceAlliesSeptember 3, 1939
South Africa Flag
South AfricaAlliesSeptember 1939
Canada Flag
CanadaAlliesSeptember 1939
Poland Flag
PolandAlliesSeptember 1, 1939
Australia Flag
AustraliaAlliesSeptember 1939
Guatemala Flag
GuatemalaAlliesDecember, 1941
Netherlands Flag
NetherlandsAlliesMay, 1940
Bolivia Flag
BoliviaAlliesApril 7, 1943
Haiti Flag
HaitiAlliesDecember, 1941
Belgium Flag
BelgiumAlliesMay, 1940
Dominican Republic Flag
Dominican RepublicAlliesDecember, 1941
Honduras Flag
HondurasAlliesDecember, 1941
Cuba Flag
CubaAlliesDecember, 1941
Czech Republic Flag
Czech RepublicAlliesMarch 15, 1939
Greece Flag
GreeceAlliesOctober 28, 1940
El Salvador Flag
El SalvadorAlliesDecember, 1941
Denmark Flag
DenmarkAlliesApril 9, 1940
Finland Flag
FinlandAlliesJune 26, 1941 - September 19, 1944
Norway Flag
NorwayAlliesApril 9, 1940
New Zealand Flag
New ZealandAlliesSeptember 1939
Costa Rica Flag
Costa RicaAlliesDecember, 1941
Panama Flag
PanamaAlliesDecember, 1941
Mongolia Flag
MongoliaAllies10 August 1945
Luxembourg Flag
LuxembourgAlliesMay, 1940
Japan Flag
JapanAxisSeptember 22, 1940 - September 2, 1945
Germany Flag
GermanyAxisSeptember 1, 1939 - May 8–9, 1945
Italy Flag
ItalyAxisJune 1940 - September 8, 1943.
Romania Flag
RomaniaAxisNovember 23, 1940 - August 23, 1944
Hungary Flag
HungaryAxisNovember 20, 1940 - March 1944
Laos Flag
LaosAxis
Bulgaria Flag
BulgariaAxisMarch 1, 1941 - September 8, 1944
Slovakia Flag
SlovakiaAxisNovember 24, 1940 - early April 1945
Croatia Flag
CroatiaAxisJune 15, 1941
Turkey Flag
TurkeyNeutral
Spain Flag
SpainNeutral
Argentina Flag
ArgentinaNeutral
Afghanistan Flag
AfghanistanNeutral
Yemen Flag
YemenNeutral
Saudi Arabia Flag
Saudi ArabiaNeutral
Sweden Flag
SwedenNeutral
Portugal Flag
PortugalNeutral
Switzerland Flag
SwitzerlandNeutral
Ireland Flag
IrelandNeutral
Uruguay Flag
UruguayNeutral
Lithuania Flag
LithuaniaNeutral
Latvia Flag
LatviaNeutral
Estonia Flag
EstoniaNeutral
Bhutan Flag
BhutanNeutral
Iceland Flag
IcelandNeutral
Andorra Flag
AndorraNeutral
Liechtenstein Flag
LiechtensteinNeutral
Monaco Flag
MonacoNeutral
San Marino Flag
San MarinoNeutral
Vatican City Flag
Vatican CityNeutral
  • Many countries have complex WWII histories. See Additional Details column for clarification.
  • List includes notable occupied territories and puppet insurgencies that were not officially recognized countries and were dissolved at the war’s conclusion.