Participants in World War I
This is a list of countries that participated in World War I, sorted by alphabetical order.
Allies / Entente Powers
- Colonies, condominiums, countries, occupations, protectorates, and territories
Alash Autonomy Canada - Canadian occupied Russian Socialist Federative Soviet Republic
Centro-Caspian Dictatorship - Committee of Members of the Constituent Assembly
Commonwealth of Australia - Australian occupied German New Guinea
- Australian occupied Russian Socialist Federative Soviet Republic
Territory of Norfolk Island Territory of Papua
Czechoslovak Republic - Czechoslovakian occupied Russian Socialist Federative Soviet Republic
Dominion of New Zealand Emirate of Nejd and Hasa Idrisid Emirate of Asir Empire of Japan Interim Southern Islands Japanese concession in Chongqing Japanese concession in Hangzhou Japanese concession in Hankou Japanese concession in Shashi Japanese concession in Suzhou Japanese concession in Tianjin Japanese Korea Japanese occupied Chinese Eastern Railway Japanese occupied Kiautschou Bay Leased Territory - Japanese occupied Republic of China
- Japanese occupied Russian Socialist Federative Soviet Republic
Japanese Taiwan Kwantung Leased Territory South Manchuria Railway Zone
French Republic Autonomous Albanian Republic of Korçë - British and French occupied Togoland Protectorate
Colony of Madagascar and Dependencies Colony of New Caledonia Crozet Islands French Algeria Equatorial Africa French concession in Hankou French concession in Shamian French concession in Tianjin French Guiana French establishments in India - French occupied Republic of Alsace-Lorraine
- French occupied German Cameroon
- French occupied German Realm
- French occupied Kingdom of Bulgaria
- French occupied Principality of Albania
- French occupied Russian Socialist Federative Soviet Republic
French protectorate in Morocco Tunisian Realm French Somaliland French West Africa Guadeloupe Île Amsterdam Île Saint-Paul Îles des Saintes Indochinese Union Kerguelen Islands Kunming–Hekou railway La Désirade Marie-Galante Martinique Mayotte New Hebrides Condominium Occupied Enemy Territory Administration Réunion Saint Barthélemy Saint Martin Saint Pierre and Miquelon Settlements in Oceania Shanghai French Concession
General Command of the Armed Forces of South Russia Khedivate of Egypt Kingdom of Belgium Belgian concession in Tianjin Belgian Congo Belgian occupied East African Territories Neutral Moresnet
Kingdom of Greece Kingdom of Italy Albanian Republic Italian concession of Tientsin Italian Eritrea Italian North Africa Italian occupied Islands of the Aegean - Italian occupied Lands of the Holy Hungarian Crown of St. Stephen
- Italian occupied Principality of Albania
- Italian occupied Russian Socialist Federative Soviet Republic
- Italian occupied The Kingdoms and Lands Represented in the Imperial Council
- Italian occupied The Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of St. Stephen
Italian Somaliland Majeerteen Sultanate Sultanate of Hobyo
Kingdom of Montenegro - Montenegrin occupied Principality of Albania
Kingdom of Nepal Kingdom of Romania - Romanian occupied Russian Socialist Federative Soviet Republic
Kingdom of Serbia - Serbian occupied Principality of Albania
- Serbian occupied Russian Socialist Federative Soviet Republic
- National Committee for Silesia
- National Council of the Duchy of Cieszyn
Newfoundland - Polish Liquidation Committee
Portuguese Republic Principality of Albania Principality of Andorra Provisional All-Russian Government Provisional Government of Autonomous Siberia - Provisional Government of National Defence
- Provisional Government of Siberia
- Provisional Government of Vladivostok
- Provisional Government of the Amur Region
Provisional Government of the Northern Region Provisional Military Dictatorship of Mughan Provisional Siberian Government Provisional Siberian Government Republic of Armenia Republic of China - Chinese occupied Russian Socialist Federative Soviet Republic
Republic of China Republic of Costa Rica Republic of Cuba Republic of Guatemala Republic of Haiti Republic of Honduras Republic of Liberia Republic of Nicaragua Republic of Panama Republic of Zakopane - Provisional Government of the Transbaikal Region
Republic of the United States of Brazil Rattanakosin Kingdom Russian Empire Autonomous Governorate of Estonia Chinese Eastern Railway - General Government of Galicia and Bukovina
Grand Principality of Finland Russian concession in Hankou Russian concession in Tianjin - Russian occupied German Realm
- Russian occupied Sublime Ottoman State
- Russian occupied Sublime State of Persia
- Russian occupied The Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of St. Stephen
Special Transcaucasian Committee
Russian Republic Autonomous Governorate of Estonia Chinese Eastern Railway Grand Principality of Finland Russian concession in Hankou Russian concession in Tianjin - Russian occupied Sublime Ottoman State
- Russian occupied Sublime State of Persia
Special Transcaucasian Committee
- State of Buryat-Mongolia
State of Slovenes, Croats and Serbs - Supreme Administration of the Northern Region
The Hashemite Kingdom of Hejaz - Trans Caspian Provisional Government
Union of South Africa - South African occupied Russian Socialist Federative Soviet Republic
South West Africa
Transcaucasian Commissariat - Transcaucasian occupied Ottoman Sublime State
- Transcaucasian occupied Sublime State of Persia
Transcaucasian Democratic Federative Republic - Transcaucasian occupied Ottoman Sublime State
- Transcaucasian occupied Sublime State of Persia
- Ufa Directory
United Kingdom of Great Britain and Ireland Aden Protectorate - Alawi Sheikhdom
- Aqrabi Sheikhdom
- Bu`si Sheikhdom
Emirate of Beihan Emirate of Dhala - Dathina Sheikhdom
- Dhubi Sheikhdom
Fadhli Sultanate - Hadrami Sheikhdom
- Hawshabi Sultanate of Musaymir
Kathiri State of Seiyun in Hadhramaut - Lower Aulaqi Sultanate
Mahra Sultanate of Qishn and Socotrat - Mawsata State
- Muflahi Sheikhdom
Qu'aiti State in Hadhramaut - Sheikhdom of Shaib
State of Upper Yafa - Subeihi Sultanate
Sultanate of Lahej Sultanate of Lower Yafa - Upper Aulaqi Sheikhdom
- Upper Aulaqi Sultanate
Wahidi Sultanate of Balhaf - Wahidi Sultanate of Bir Ali
Wahidi Sultanate of Habban
Anglo-Egyptian Sudan Ascension Island Bailiwick of Guernsey Bailiwick of Jersey Baker Island Basutoland Bechuanaland Protectorate Bermuda - British and French occupied Togoland Protectorate
- British concession in Amoy
- British concession in Hankou
- British concession in Jiujiang
- British concession in Shamian
- British concession in Tianjin
- British concession in Zhenjiang
British Cyprus British Guiana British Honduras British Mauritius - British occupied German Cameroon
British occupied German East Africa - British occupied German New Guinea
British occupied Khedivate of Egypt - British occupied Kingdom of Bulgaria
- British occupied Russian Socialist Federative Soviet Republic
- British occupied Russian Soviet Republic
- British occupied Sublime Ottoman State
- British occupied Sublime State of Persia
British Protectorate of Uganda British Togoland British Trinidad and Tobago British Somaliland Protectorate British Western Pacific Territories - Heard Island and McDonald Islands
Indian Empire Aden Protectorate - Alawi Sheikhdom
- Aqrabi Sheikhdom
- Bu`si Sheikhdom
Emirate of Beihan Emirate of Dhala - Dathina Sheikhdom
- Dhubi Sheikhdom
Fadhli Sultanate - Hadrami Sheikhdom
- Hawshabi Sultanate of Musaymir
Kathiri State of Seiyun in Hadhramaut - Lower Aulaqi Sultanate
Mahra Sultanate of Qishn and Socotrat - Mawsata State
- Muflahi Sheikhdom
Qu'aiti State in Hadhramaut - Sheikhdom of Shaib
State of Upper Yafa - Subeihi Sultanate
Sultanate of Lahej Sultanate of Lower Yafa - Upper Aulaqi Sheikhdom
- Upper Aulaqi Sultanate
Wahidi Sultanate of Balhaf - Wahidi Sultanate of Bir Ali
Wahidi Sultanate of Habban
State of Bahrain Sheikhdom of Kuwait Sultanate of Muscat and Oman The Trucial States of the Coast of Oman State of Qatar Kingdom of Tonga New Hebrides Condominium Pitcairn, Henderson, Ducie and Oeno Islands - Union Islands
State of Brunei Ceylon Colony and Protectorate of Nigeria Colony and Protectorate of Sierra Leone - Colony of Barbados
Colony of Jamaica Colony of the Bahamas Colony of the Gold Coast Company rule in Rhodesia Crown Colony of the Island of Malta and its Dependencies East Africa Protectorate Falkland Islands Federal Colony of the Leeward Islands Federal Colony of the Windward Islands Federated Malay States Gambia Colony and Protectorate Gibraltar Territory of Heard Island and McDonald Islands Hong Kong Isle of Man Jarvis Island Kingdom of Sarawak Nyasaland Protectorate Occupied Enemy Territory Administration Phoenix Islands Saint Helena Seychelles Sheikhdom of Kuwait State of North Borneo Straits Settlements Sultanate of Egypt Sultanate of the Maldive Islands Sultanate of Zanzibar Swaziland Protectorate - Territory of Ashmore and Cartier Islands
Tristan da Cunha - Unfederated Malay States
Victoria Land Weihaiwei
United States of America - American occupied Dominican Republic
- American occupied Republic of Cuba
- American occupied Republic of Haiti
- American occupied Republic of Nicaragua
- American occupied Russian Socialist Federative Soviet Republic
Bajo Nuevo Bank Guantanamo Bay Naval Base Howland Island Insular Government of the Philippine Islands Johnston Atoll Kingman Reef Middlebrook Island Midway Atoll Navassa Island Panama Canal Zone Puerto Rico Quita Sueño Bank Roncador Bank Serrana Bank Serranilla Bank Swan Islands Territory of Alaska Territory of American Samoa Territory of Guam Territory of Hawaii United States Virgin Islands Wake Island
- Ural Provisional Provincial Government
West Ukrainian People's Republic
- Non-state actors
- Anhui clique
Assyrians - Cornelius Wyk's forces
- Czechoslovak Legions
- Czechoslovak Legions occupied Russian Socialist Federative Soviet Republic
- Czechoslovak Legions occupied Russian Soviet Republic
Fengtian clique Karelian Regiment - Polish Legions
- Polish Legions occupied Russia
- Polish Legions occupied Russian Soviet Republic
- Pontic Greeks
- Ruwallah
White movement - Baikal Cossacks
Chinese Eastern Railway - Kamchatka
- Sakhalin
- Tuva
- Volunteer Army
- Yunnan clique
- Zhili clique
Central Powers
- Colonies, condominiums, countries, occupations, protectorates, and territories
Azerbaijan Democratic Republic Belarusian People's Republic Crimean Regional Government Crimean People's Republic Democratic Republic of Georgia Dervish State Don Republic Duchy of Courland and Semigallia Emirate of Jabal Shammar German Realm Duchy of Anhalt Duchy of Brunswick Duchy of Saxe-Altenburg Duchy of Saxe-Coburg and Gotha Duchy of Saxe-Meiningen Free and Hanseatic City of Bremen Free and Hanseatic City of Lübeck Free and Hanseatic City of Hamburg Free People's State of Württemberg Free State of Brunswick Free State of Lippe Free State of Oldenburg Free State of Saxe-Meiningen Free State of Saxe-Weimar-Eisenach Free State of Prussia German Cameroon - German concession in Hankou
German concession in Hankou German concession in Tianjin German New Guinea - German occupied French Republic
- German occupied Grand Dutchy of Luxembourg
- German occupied Kingdom of Romania
- German occupied Portuguese Mozambique
German Samoa German South West Africa Government General of Warsaw Grand Duchy of Baden Grand Duchy of Hesse Grand Duchy of Mecklenburg-Schwerin Grand Duchy of Mecklenburg-Strelitz Grand Duchy of Oldenburg Grand Duchy of Saxony Imperial German General Government of Belgium Imperial Territory of Alsace-Lorraine Kiautschou Bay Leased Territory Kingdom of Bavaria Kingdom of Prussia Kingdom of Saxony Kingdom of Württemberg Neutral Moresnet - Northern Dobruja
People's State of Hesse Principality of Lippe Principality of Reuss-Gera Principality of Reuss-Greiz Principality of Schwarzburg-Rudolstadt Principality of Schwarzburg-Sondershausen Principality of Schaumburg-Lippe - Principality of Waldeck-Pyrmont
Supreme Commander of All German Forces in the East Togoland Protectorate
Kingdom of Bulgaria - Bulgarian occupied Kingdom of Greece
- Bulgarian occupied Kingdom of Serbia
- Bulgarian occupied Principality of Albania
- Northern Dobruja
Kingdom of Finland Kingdom of Lithuania Kingdom of Poland - Kuban People's Republic
Mountainous Republic of the Northern Caucasus Republic of Finland South African Provisional Government Sublime Ottoman State - Ottoman occupied Aden Protectorate
- Ottoman occupied Republic of Armenia
- Ottoman occupied Russian Empire
- Ottoman occupied State of Qatar
- Ottoman occupied Sublime State of Persia
- Ottoman occupied Sultanate of Egypt
- Ottoman occupied Transcaucasian Democratic Federative Republic
- Ottoman occupied Emirate of Upper Asir
Yemen Vilayet
- Regional Government of Northwest Russia
Sultanate of Darfur The Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of St. Stephen Lands of the Crown of Saint Stephen - Austro-Hungarian concession in Tianjin
- Austro-Hungarian occupied Kingdom of Itay
- Austro-Hungarian occupied Kingdom of Montenegro
- Austro-Hungarian occupied Kingdom of Romania
- Austro-Hungarian occupied Principality of Albania
- Austro-Hungarian protectorate of Albania
- Carpathian passes
City of Fiume and its District Condominium of Bosnia and Herzegovina - Imperial and Royal Military Administration in Serbia
Kingdom of Croatia-Slavonia Kingdom of Hungary - Northern Dobruja
The Kingdoms and Lands Represented in the Imperial Council - Austro-Hungarian concession in Tianjin
- Austro-Hungarian occupied Kingdom of Itay
- Austro-Hungarian occupied Kingdom of Montenegro
- Austro-Hungarian occupied Kingdom of Romania
- Austro-Hungarian occupied Principality of Albania
- Carpathian passes
Condominium of Bosnia and Herzegovina Duchy of Bukovina Duchy of Carinthia Duchy of Carniola Duchy of Salzburg Duchy of Styria Duchy of Upper and Lower Silesia - Imperial and Royal Military Administration in Serbia
Imperial Free City of Trieste Kingdom of Bohemia Kingdom of Dalmatia Kingdom of Galicia and Lodomeria Margraviate of Istria Margraviate of Moravia - Northern Dobruja
Princely County of Tyrol Princely County of Gorizia and Gradisca
United Baltic Duchy Ukrainian People's Republic Ukrainian State
- Non-state actors
- 'Anazzah
- Ag Kaocen's forces
- Alibi Dzhangildin and Amankeldi Imanov's forces
- Auliyahan'
- Barue forces
Basmachi - Bussa forces
- Charlemagne Péralte's forces
- Dasa's forces
- Dashti people
- Desiderio Arias's forces
- Egba's forces
- Hibernian Rifles
- Internal Macedonian Revolutionary Organization
- Irish Citizen Army
Irish Republican Brotherhood - Irish Volunteers
- Iwellemmedans
- Jangal movement
- John Chilembwe's forces
- Kokonur forces
- Makonbe forces
- Laristani people
- Persian Central Government Gendarmerie
- Polish Legions
- Phu Mi Bun Movement
- Qashqai people
Senussi - Simko Shikak's forces
- Tangistani people
- The Fianna of Ireland
- The Irishwomen's Council
- Trinh Can's forces
- Tulante Buta's forces
White movement - Villistas
- Zaian Confederation
Russia / Russian Soviet Republic / Russian Socialist Federative Soviet Republic and allies
Baku Commune Donets-Krivoy Rog Soviet Republic Finnish Socialist Workers' Republic Free Socialist Republic of Germany Odessa Soviet Republic People's State of Bavaria Republic of Alsace-Lorraine - Republic of Tarnobrzeg
- Russia
Russian Socialist Federative Soviet Republic Russian Soviet Republic Autonomous Governorate of Estonia Bashkortostan - Black Sea Soviet Republic
Don Soviet Republic - Kuban-Black Sea Soviet Republic
- Kuban Soviet Republic
- North Caucasian Soviet Republic
- Turkestan Socialist Federative Republic
Ukrainian People's Republic of Soviets Ukrainian Soviet Republic
Soviet Republic of Soldiers and Fortress-Builders
- Non-state actors
Neutral countries
- Declared neutral colonies, condominiums, countries, occupations, protectorates, and territories
Kingdom of Denmark Danish West Indies Greenland Iceland
Kingdom of Norway[lower-alpha 1] Kingdom of Spain Kingdom of Sweden[lower-alpha 2] Kingdom of the Netherlands[lower-alpha 3] Sublime State of Persia[lower-alpha 4] Swiss Confederation[lower-alpha 5]
- De facto netural colonies, condominiums, countries, occupations, protectorates, and territories
- Anadyr
Argentine Republic Banat Republic - Chokwe Kingdom
Emirate of Afghanistan[lower-alpha 6] Emirate of Bukhara Empire of China Eastern Republic of Uruguay - Emirate of Upper Asir
Ethiopian Empire[lower-alpha 7] Ethiopian Empire Grand Duchy of Luxembourg[lower-alpha 8] Moldavian Democratic Republic Mutawakkilite Kingdom of Yemen Khanate of Khiva - Kingdom of Bhutan
Komancza Republic Lands of the Crown of Saint Stephen Principality of Liechtenstein[lower-alpha 9] - Provisional Government of Autonomous Turkistan
Peruvian Republic Principality of Monaco - Republic of Estonia
Republic of Bolivia Republic of Chile Republic of Colombia Republic of Ecuador Republic of El Salvador Republic of Lithuania Republic of Paraguay Republic of San Marino[lower-alpha 10] Shanghai International Settlement - Social Revolutionary Regime in Blagoveshchensk
- Spitsbergen
- State of Qatar
Sultanate of Sulu Tibet The Kingdoms and Lands Represented in the Imperial Council United Mexican States[lower-alpha 11] United States of Venezuela - Yakutia
- Non-state actors
- Aboriginal Australians
- Chukchi people
- Cinta Larga
- Cuanhama chiefdom
- Dembos people
- Don Cossacks
- Guangdong
- Guangxi
- Guizhou
- Hunan
- Inughuits
- Kuban Cossacks
- Liberation Army of the South
- Lunda people
- Ma clique
- National Pacification Army
- Nganasan people
- Nunavimmiut Inuit from Nunavik
- Oaxaca
- Orenburg Cossacks
- Papuan people
- Qikiqtaaluk Inuit from Baffin Island
- Semirechye Cossacks
- Shanxi clique
- Siberian Cossacks
- Sichuan clique
- Tripolitania
- Tunumiits
- Turkana people
- Xinjiang clique
- Yanomami
Notes
- ↑ Gave naval assistance to the United Kingdom
- ↑ Non-belligerent
- ↑ Traded with both sides
- ↑ Civil dispute and Allied Campaign against Ottomans
- ↑ Switzerland did declare a "state of siege"
- ↑ Received a German diplomatic mission trying to convince it to act against the British in India
- ↑ Supported Central Powers and was on the verge of entering the war before Iyasu V's dethronement
- ↑ Never declared war on the Central Powers despite being invaded and occupied by Germany
- ↑ Had a customs and monetary union with Austria-Hungary
- ↑ 20 volunteers joined on the Italian (Allied) side. Cut diplomatic ties with Austria–Hungary, but it never entered the war
- ↑ Declined an alliance with Germany (see Zimmermann Telegram)
Declarations of war
The following table shows the timeline of the several declarations of war among the belligerent powers. Entries on a yellow background show severed diplomatic relations only, not actual declarations of war.
Date | Declarer | On |
---|---|---|
1914 | ||
July 28 | ||
August 1 | ||
August 3 | ||
August 4 | ||
August 5 | ||
August 6 | ||
August 9 | ||
August 11 | ||
August 12 | ||
August 22 | ||
August 23 | ||
August 25 | ||
October 5 | ||
November 1 | ||
November 2 | ||
November 3 | ||
November 5 | ||
1915 | ||
May 23 | ||
August 21 | ||
October 14 | ||
October 15 | ||
October 16 | ||
October 19 | ||
1916 | ||
March 9 | ||
March 15 | ||
August 27 | ||
August 28 | ||
August 30 | ||
November 1 | ||
1917 | ||
April 6 | ||
April 7 | ||
April 10 | ||
April 13 | ||
April 20 | ||
July 2 | ||
July 22 | ||
August 4 | ||
August 14 | ||
October 6 | ||
October 7 | ||
October 26 | ||
December 7 | ||
December 7 | ||
December 10 | ||
December 16 | ||
1918 | ||
April 23 | ||
May 8 | ||
May 23 | ||
July 12 | ||
July 19 | ||
November 10 |
See also
Notes and references
- ^ British Empire was the common term for the United Kingdom and its overseas possessions at this time. The term refers to the colonies it controlled, to the Indian Empire, which, while not officially designated a colony, was functionally indistinguishable from one, and the British Dominions - former colonies which were self-governing in most respects but whose foreign policy was controlled by London; Australia, Canada, Newfoundland, New Zealand and South Africa. At that time, the United Kingdom of Great Britain and Ireland also included the entire island of Ireland.
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