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Every Country That Participated in World War I and World War II

There were 59 countries that, at some point, were mainly sovereign and also involved in World War I or II. Can you name them all?
Only including countries as of the beginning of 1914 and / or September 1st, 1939 and war was brought to them before their autonomy ended (which is why countries such as Albania, Czechoslovakia, Estonia, Latvia and Lithuania have been excluded)
Iraq, Egypt, Mongolia, the Philippines and Tannu Tuva have been excluded due to limited sovereignity
Includes countries that were not initially part of either alliance
Just warning you - there was one "country" that you probably would never guess, but technically follows all the guidelines I created
Quiz by
MeowILoveCats123
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Last updated: June 17, 2025
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First submittedJune 17, 2025
Times taken33
Average score78.0%
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Alliance They Were In
Country
War(s) Involved In
Allies
Argentina
World War II
Allies
Australia
World War II
Central Powers
Austria-Hungary
World War I
Entente, Allies
Belgium
World War I, World War II
Allies
Bolivia
World War II
Entente, Allies
Brazil
World War I, World War II
Entente, Allies
British Empire / United Kingdom
World War I, World War II
Allies
British Raj / India
World War II
Central Powers, Axis (later Allies)
Bulgaria
World War I, World War II
Allies
Canada
World War II
Allies
Chile
World War II
Entente, Allies
China
World War I, World War II
Allies
Colombia
World War II
Entente, Allies
Costa Rica
World War I, World War II
Entente, Allies
Cuba
World War I, World War II
Axis
Danzig
World War II
Allies
Denmark
World War II
Allies
Dominican Republic
World War II
Allies
Ecuador
World War II
Allies
El Salvador
World War II
Allies
Ethiopia
World War II
Originally neither side, later Allies
Finland
World War II
Entente, Allies
France
World War I, World War II
Central Powers
German Empire
World War I
Entente, Allies
Greece
World War I, World War II
Entente, Allies
Guatemala
World War I, World War II
Entente, Allies
Haiti
World War I, World War II
Entente, Allies
Honduras
World War I, World War II
Axis (later Allies)
Hungary
World War II
Allies
Iran
World War II
Entente, Axis (later Allies)
Italy
World War I, World War II
Entente, Axis
Japanese Empire
World War I, World War II
Entente
Liberia
World War I
Allies
Luxembourg
World War II
Allies
Mexico
World War II
Entente
Montenegro
World War I
Axis
Nazi Germany
World War II
Allies
Netherlands
World War II
Allies
New Zealand
World War II
Entente, Allies
Nicaragua
World War I, World War II
Allies
Norway
World War II
Central Powers
Ottoman Empire
World War I
Entente, Allies
Panama
World War I, World War II
Allies
Paraguay
World War II
Allies
Peru
World War II
Allies
Poland
World War II
Entente
Portugal
World War I
Entente, Axis (later Allies)
Romania
World War I, World War II
Entente
Russian Empire
World War I
Entente
Serbia
World War I
Entente
Siam
World War I
Allies
South Africa
World War II
Allies
Soviet Union
World War II
Axis (later Allies)
Thailand
World War II
Allies
Turkey
World War II
Entente, Allies
United States
World War I, World War II
Allies
Uruguay
World War II
Allies
Venezuela
World War II
Axis (later Allies)
Yugoslavia
World War II
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2 Comments
apprenticefossa
+1
Level 55
Aug 11, 2025
How come India, which was neither de jure nor de facto independent, counts but Mongolia and Iraq don't?
MeowILoveCats123
+1
Level 67
Aug 12, 2025
Sorry about India! At the time, I didn't know that there were levels of sovereignity (de jure, de facto) so I was using ChatGPT to determine whether they would be considered over 50% sovereign. 😳 The AI tool said no for all of them
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