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
ChinaAlliesDecember, 1941
United StatesAlliesDecember 11. 1941
BrazilAlliesAugust 22, 1942
RussiaAlliesJune 22, 1941
EthiopiaAlliesJuly, 1940
MexicoAlliesMay 22, 1942
PhilippinesAlliesDecember 8, 1941
IranAllies
United KingdomAlliesSeptember 3, 1939
FranceAlliesSeptember 3, 1939
South AfricaAlliesSeptember 1939
CanadaAlliesSeptember 1939
PolandAlliesSeptember 1, 1939
AustraliaAlliesSeptember 1939
GuatemalaAlliesDecember, 1941
NetherlandsAlliesMay, 1940
BoliviaAlliesApril 7, 1943
HaitiAlliesDecember, 1941
BelgiumAlliesMay, 1940
Dominican RepublicAlliesDecember, 1941
HondurasAlliesDecember, 1941
CubaAlliesDecember, 1941
Czech RepublicAlliesMarch 15, 1939
GreeceAlliesOctober 28, 1940
El SalvadorAlliesDecember, 1941
DenmarkAlliesApril 9, 1940
FinlandAlliesJune 26, 1941 - September 19, 1944
NorwayAlliesApril 9, 1940
New ZealandAlliesSeptember 1939
Costa RicaAlliesDecember, 1941
PanamaAlliesDecember, 1941
MongoliaAllies10 August 1945
LuxembourgAlliesMay, 1940
JapanAxisSeptember 22, 1940 - September 2, 1945
GermanyAxisSeptember 1, 1939 - May 8–9, 1945
ItalyAxisJune 1940 - September 8, 1943.
RomaniaAxisNovember 23, 1940 - August 23, 1944
HungaryAxisNovember 20, 1940 - March 1944
LaosAxis
BulgariaAxisMarch 1, 1941 - September 8, 1944
SlovakiaAxisNovember 24, 1940 - early April 1945
CroatiaAxisJune 15, 1941
TurkeyNeutral
SpainNeutral
ArgentinaNeutral
AfghanistanNeutral
YemenNeutral
Saudi ArabiaNeutral
SwedenNeutral
PortugalNeutral
SwitzerlandNeutral
IrelandNeutral
UruguayNeutral
LithuaniaNeutral
LatviaNeutral
EstoniaNeutral
BhutanNeutral
IcelandNeutral
AndorraNeutral
LiechtensteinNeutral
MonacoNeutral
San MarinoNeutral
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.