Draft:Participants of World War I





The two main groups of the participants of World War I were the Allied Powers and the Central Powers. This article contains lists of participants of World War I (in alphabetical order) until the signing of the Treaty of Sèvres (1920).

Allies and Associated Powers/The Entente
The Allies were a group of countries that fought the Central Powers. They were (in order of joining): Serbia, the Russian Empire (later the Russian Republic), France, Belgium, the United Kingdom, Japan, Italy, Portugal, Romania, the United States, Greece, and many others.

List

 * Colonies, condominiums, countries, occupations, protectorates, and territories


 * Centro-Caspian Dictatorship
 * Committee of Members of the Constituent Assembly
 * Commonwealth of Australia
 * Australian occupied German New Guinea
 * Territory of Norfolk Island
 * Territory of Papua
 * Czechoslovak Republic
 * Czechoslovak Legion
 * Dominion of New Zealand
 * Cook Islands
 * Niue
 * New Zealand occupied German Samoa
 * Emirate of Nejd and Hasa
 * Idrisid Emirate of Asir
 * Empire of Japan (since 23 August 1914)
 * 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 (since 26 August 1914)
 * Colony of Madagascar and Dependencies
 * Colony of New Caledonia
 * Protectorate of the Wallis and Futuna Islands
 * Crozet Islands
 * French Algeria
 * Equatorial Africa
 * French Chad
 * 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
 * Colony of Mauritania
 * Côte d'Ivoire
 * Enclaves of Forcados and Badjibo
 * French Dahomey
 * French Guinea
 * French Sudan
 * French Togoland
 * French Upper Volta
 * Senegal
 * Upper Senegal and Niger
 * Guadeloupe
 * Ubangi-Shari
 * Île Amsterdam
 * Île Saint-Paul
 * Îles des Saintes
 * Indochinese Union
 * French Cochinchina
 * French Protectorate of Cambodia
 * French Protectorate of Laos
 * Kouang-Tchéou-Wan
 * Protectorate of Annam
 * Protectorate of Tonkin
 * 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 (since 4 August 1914)
 * Belgian concession in Tianjin
 * Belgian Congo (since 15 August 1914)
 * Belgian occupied East African Territories (since 6 May 1916)
 * Neutral Moresnet (since 4 August 1914)
 * 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 (since 9 March 1916)
 * Fort of St John the Baptist of Ouidah
 * Macau
 * Portuguese Angola
 * Portuguese Cape Verde
 * Portuguese Congo
 * Portuguese Guinea
 * Portuguese Mozambique
 * Portuguese São Tomé and Príncipe
 * Portuguese Timor
 * State of India
 * 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 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
 * Sultanate of Darfur
 * 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
 * British Solomon Islands Protectorate
 * Colony of Fiji
 * Gilbert and Ellice Islands
 * 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
 * Falkland Islands Dependencies
 * Federal Colony of the Leeward Islands
 * British Leeward Islands
 * Federal Colony of the Windward Islands
 * British Windward Islands
 * Federated Malay States
 * Negeri Sembilan
 * Pahang
 * Perak
 * Selangor
 * 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
 * State of Johor Darul Ta'zim
 * State of Kedah Darul Aman
 * State of Kelantan Darul Naim
 * State of Perlis Indera Kayangan
 * State of Terengganu Darul Iman
 * Victoria Land
 * Weihaiwei
 * United States of America
 * 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

State actors

 * Alash Autonomy
 * Beda Sultanate
 * Czechoslovak Republic
 * Czechoslovak National Council
 * Czechoslovak Legion
 * Czechoslovak Legion in Italy
 * Czechoslovak Legion in France
 * Czechoslovak Legion in Russia
 * Czechoslovak-occupied RSFSR
 * Committee of Members of the Constituent Assembly
 * Emirate of Nejd and Hasa
 * Empire of Japan
 * Japanese concession in Tianjin
 * Japanese Korea
 * Japanese Military
 * Imperial Japanese Army
 * Imperial Japanese Army Air Service
 * Imperial Japanese Navy
 * Imperial Japanese Navy Air Service
 * Japanese-occupied Republic of China
 * Japanese occupied German New Guinea
 * Japanese-occupied Kiautschou Bay Leased Territory
 * Japanese occupied Russian Socialist Federative Soviet Republic
 * Transbaikal (protectorate)
 * Vladivostok Protectorate (protectorate)
 * Japanese Taiwan
 * Kwantung Leased Territory
 * South Manchuria Railway Company
 * First Costa Rican Republic
 * French Third Republic
 * French Colonial Empire
 * Colony of Madagascar and Dependencies
 * Colony of Comoros
 * Crozet Islands
 * Île Saint-Paul
 * Isle of Amsterdam
 * Kerguelen
 * Scattered Islands in the Indian Ocean
 * Terre Adélie
 * Colony of New Caledonia
 * French Algeria
 * French concession of Hankou
 * French Concession of Shamian Island, Guangzhou
 * French Concession of Shanghai
 * Kunming–Hai Phong French Railway
 * Equatorial Africa
 * French Chad
 * French Congo
 * Ubangi-Shari
 * French concession in Tianjin
 * French Guiana
 * French India
 * French protectorate in Morocco (protectorate)
 * French-occupied German Cameroon
 * French protectorate of Tunisia (protectorate)
 * French Somaliland
 * French West Africa
 * Colony of Mauritania
 * French Dahomey
 * French Guinea
 * French Sudan
 * French Togoland
 * Upper Senegal and Niger
 * Upper Volta
 * Guadeloupe
 * Indochinese Union
 * French Protectorate of Cambodia (protectorate)
 * French Protectorate of Laos (protectorate)
 * Guangzhouwan
 * Nguyễn dynasty (protectorate)
 * Kingdom of Sanwi (protectorate)
 * Martinique
 * New Hebrides
 * Occupation of Constantinople
 * Occupied Enemy Territory Administration
 * Réunion
 * Saint Martin
 * Wallis and Futuna
 * French Military
 * French Army
 * Army of Africa
 * Tirailleurs
 * French administration of the Banat (Armée d'Orient)
 * French Navy
 * French-occupied Alsace-Lorraine
 * French-occupied German Empire
 * French-occupied Principality of Albania
 * Autonomous Province of Korçë
 * French-occupied RSFSR
 * French-occupied Sublime Ottoman State
 * Memel Territory
 * Idrisid Emirate of Asir
 * Kingdom of Belgium
 * Belgian Military
 * Air Component
 * Land Component
 * Naval Component
 * Belgian Colonial Empire
 * Belgian concession in Tianjin
 * Belgian Congo
 * Belgian-occupied German East Africa
 * Neutral Moresnet
 * Kingdom of the Hellenes
 * Occupation of Constantinople
 * Occupation of Smyrna
 * Kingdom of Italy
 * Italian Military
 * Regia Marina
 * Royal Italian Army
 * Italian Colonial Empire
 * Albanian Republic
 * Hobyo Sultanate (protectorate)
 * Italian concession of Tientsin (Italian concession in Tianjin)
 * Italian Cyrenaica
 * Italian Eritrea
 * Italian Islands of the Aegean
 * Italian Somaliland
 * Italian Tripolitania
 * Majeerteen Sultanate (protectorate)
 * Italian-occupied Austro-Hungarian Empire
 * Occupation of Constantinople
 * Kingdom of Montenegro
 * Kingdom of Romania
 * Romanian Military
 * Romanian Land Forces
 * Romanian Air Corps
 * Romanian Naval Forces
 * Kingdom of Serbia
 * Chetniks
 * Toplica Uprising
 * Royal Serbian Army
 * Unification or Death (Black Hand)
 * Oriental Republic of Uruguay
 * Portugese Republic
 * Kingdom of Kongo (subject)
 * Portugese Empire
 * Portuguese Macau
 * Portuguese West Africa
 * Portuguese Cape Verde
 * Portuguese Congo
 * Portuguese Guinea
 * Portuguese East Africa
 * Portuguese São Tomé and Príncipe
 * Portuguese Timor
 * State of India
 * Portugese Military
 * Principality of Albania
 * Rattanakosin Kingdom (Siam)
 * Republic of China (First)
 * Chinese Military
 * Chinese Warlords
 * Anhui clique
 * Fengtian clique
 * Shanxi clique
 * Yunnan clique
 * Zhili clique
 * Occupation of Mongolia
 * Republic of Guatemala
 * Republic of Honduras
 * Republic of Liberia
 * Liberian Frontier Force
 * Republic of Peru
 * Republic of San Marino
 * Republic of the United States of Brazil
 * Brazilian Military
 * Russian Empire
 * Baltic Governorates
 * Courland Governorate
 * Governorate of Livonia
 * Caucasus Viceroyalty
 * Black Sea Governorate
 * Chinese Eastern Railway
 * Congress Poland
 * Suwałki Governorate
 * Emirate of Bukhara (protectorate)
 * General Government of Galicia and Bukovina
 * Grand Duchy of Finland
 * Khanate of Khiva (protectorate)
 * Russian concession in Tianjin
 * Russian Military
 * Cossacks
 * Cossack hosts
 * Baikal Cossacks
 * Don Cossacks
 * Don Host Oblast
 * Kuban Cossacks
 * Persian Cossack Brigade
 * Imperial Russian Air Service
 * Imperial Russian Army
 * Military Districts
 * Vilna Military District
 * Warsaw Military District
 * 2nd Army
 * Imperial Russian Navy
 * Baltic Fleet
 * Black Sea Fleet
 * Russian-occupied Eastern Galicia
 * Russian-occupied German Empire
 * Russian-occupied Sublime Ottoman State
 * Russian-occupied Sublime State of Persia
 * Russian Turkestan
 * Fergana
 * Samarkand
 * Semirechye Oblast
 * Syr-Darya Oblast
 * Transcaspian Oblast
 * Uryankhay Krai (protectorate)
 * Vistula Land
 * Western Krai
 * Northwestern Krai
 * Grodno Governorate
 * Kovno Governorate
 * Minsk Governorate
 * Mogilev Governorate
 * Vilna Governorate
 * Vitebsk Governorate
 * Southwestern Krai
 * Kiev Governorate
 * Podolia Governorate
 * Volhynia Governorate
 * Russian Provisional Government
 * Autonomous Governorate of Estonia
 * Russian concession in Tianjin
 * Russian Military
 * Russian Army
 * Special Transcaucasian Committee
 * Russian Republic
 * All-Russian Constituent Assembly
 * Transcaucasian Commissariat
 * Transcaucasian-occupied Ottoman Sublime State
 * Transcaucasian-occupied Sublime State of Persia
 * Autonomous Governorate of Estonia
 * Russian concession in Tianjin
 * Russian Military
 * Russian Army
 * Russian Soviet Republic (Russian Socialist Soviet Republic) (Russian Socialist Federative Soviet Republic) (Russian Soviet Federative Socialist Republic) (RSFSR)
 * Amur Socialist Soviet Republic
 * Armed Forces of the Russian Soviet Republic
 * Red Army
 * Red Cossacks
 * Amur Cossacks
 * Lower classes of Orenburg Cossacks
 * Red Latvian Riflemen
 * Turkestan Front
 * Red Navy
 * Baku Soviet Commune
 * Bashkir Autonomous Soviet Socialist Republic
 * Bessarabian Soviet Socialist Republic
 * Black Sea Soviet Republic
 * Byelorussian Soviet Socialist Republic
 * Commune of the Working People of Estonia
 * Crimean Socialist Soviet Republic
 * Donetsk-Krivoy Rog Soviet Republic
 * Don Soviet Republic
 * Far Eastern Republic
 * Finnish Socialist Workers' Republic (Red Finland)
 * Red Guards
 * First Revolutionary Committee of Chukotka
 * Galician Soviet Socialist Republic
 * Jangal Movement
 * Gilan Soviet Republic (Persian SSR)
 * Karelian Workers' Commune
 * Kuban-Black Sea Soviet Republic
 * Kuban Soviet Republic
 * Latvian Socialist Soviet Republic
 * Litbel
 * Lithuanian Soviet Socialist Republic
 * Mughan Soviet Republic
 * North Caucasian Soviet Republic
 * Odessa Soviet Republic
 * Petrograd Soviet
 * Red Guards
 * Socialist Soviet Republic of Byelorussia
 * Tatar Autonomous Soviet Socialist Republic
 * Taurida Soviet Socialist Republic
 * Terek Soviet Republic
 * Turkestan Autonomous Socialist Federative Republic
 * Ukrainian People's Republic of Soviets
 * Ukrainian Soviet Republic
 * Ukrainian Soviet Socialist Republic
 * Volga German Autonomous Soviet Socialist Republic
 * Second Polish Republic
 * Central Lithuania
 * Polish Army
 * Republic of Zakopane
 * Soviet Republic of Naissaar (Soviet Republic of Soldiers and Fortress-Builders of Naissaar) (Soviet Republic of Soldiers and Fortress-Builders)
 * State of Slovenes, Croats and Serbs
 * State of Thessaloniki
 * Allied-occupied Kingdom of Greece
 * Turkestan Autonomy
 * Ukrainian People's Republic
 * Central Rada of Ukraine
 * Directorate of Ukraine
 * Kholodny Yar Republic
 * Sich Riflemen
 * Ukrainian People's Army
 * West Ukrainian People's Republic
 * Ukrainian Galician Army
 * United Kingdom of Great Britain and Ireland
 * British Empire
 * Anglo-Egyptian Sudan
 * Basutoland
 * Bechuanaland (protectorate)
 * Bermuda
 * British concession in Tianjin
 * British Cyprus
 * British Guiana
 * British Honduras
 * British Leeward Islands
 * British Mauritius
 * British occupied German Cameroon
 * British occupied German East Africa
 * British-occupied German Togoland
 * British-occupied Sublime State of Persia
 * Seistan Force
 * British Raj (Indian Empire)
 * Aden Settlement (Province of Aden) (protectorate)
 * Fadhli Sultanate
 * Agencies
 * Baluchistan Agency
 * Central India Agency
 * Deccan States Agency
 * Madras States Agency
 * Punjab States Agency
 * Kingdom of Sikkim (protectorate)
 * Princely States (vassals)
 * Ajaigarh
 * Akkalkot
 * Aligarh
 * Alipura
 * Alirajpur
 * Alwar
 * Amb
 * Khanate of Kalat
 * Kingdom of Cochin
 * Kingdom of Mysore
 * State of Chitral
 * State of Dir
 * State of Hyderabad
 * State of Kharan
 * State of Las Bela
 * The Yousafzai State of Swat
 * Other Princely States
 * British Somaliland Protectorate
 * British Western Pacific Territories
 * British Windward Islands
 * Central-Caspian Dictatorship (protectorate)
 * Ceylon
 * Colony of the Bahama Islands
 * Colony of Barbados
 * Colony of Jamaica and Dependencies
 * Colony of Nigeria
 * Colony of Trinidad and Tobago
 * Commonwealth of Australia
 * ANZAC
 * Norfolk Island
 * Territory of Papua
 * Company rule in Rhodesia
 * Crown Colony of Malta
 * Crown colony of Seychelles
 * Dominion of Canada
 * Canadian-occupied Russian Soviet Federative Socialist Republic
 * Dominion of Newfoundland
 * Dominion of New Zealand
 * ANZAC
 * New Zealand-occupied German Samoa
 * East Africa Protectorate
 * Falkland Islands
 * Falkland Islands Dependencies
 * Federated Malay States (protectorate)
 * Negeri Sembilan
 * Pahang Darul Makmur
 * Perak
 * Selangor Darul Ehsan
 * Gambia Colony and Protectorate
 * Gibraltar
 * Gold Coast
 * Hong Kong
 * Khedivate of Egypt (protectorate)
 * Anglo-Egyptian Sudan
 * Kingdom of Tonga (protectorate)
 * Military Dictatorship of Mughan
 * Nation of Brunei, the Abode of Peace (Brunei Darussalam) (Sultanate of Brunei) (protectorate)
 * New Hebrides
 * Northern Persia (protectorate)
 * Nyasaland
 * Occupation of Constantinople
 * Occupied Enemy Territory Administration
 * Saint Helena
 * Sheikhdom of Kuwait (protectorate)
 * State of Qatar (protectorate)
 * Straits Settlements
 * Dindings
 * Malacca
 * Penang and Province Wellesley
 * Singapore
 * Sultanate of Egypt (protectorate)
 * Anglo-Egyptian Sudan
 * Sultanate of Muscat and Oman (protectorate)
 * Sultanate of Zanzibar (protectorate)
 * Swaziland (protectorate)
 * Trucial States (Trucial Oman) (Truicial Sheikhdoms) (Trucial Coast) (protectorate)
 * Unfederated Malay States (protectorate)
 * State of Johor Darul Ta'zim
 * State of Kedah Darul Aman
 * State of Kelantan Darul Naim
 * State of Perlis Indera Kayangan
 * State of Terengganu Darul Iman
 * Union of South Africa
 * South West Africa
 * Wituland (protectorate)
 * British Military
 * British Army
 * Chinese Labor Corps
 * South Persia Rifles
 * Royal Air Force (RAF)
 * Royal Navy
 * British-occupied Sublime Ottoman State
 * British-occupied RSFSR
 * Constituent Countries of the United Kingdom
 * England
 * Wales
 * Ireland
 * Scotland
 * Crown Dependencies of the British Crown
 * Bailiwick of Jersey
 * Guernsey
 * Isle of Man
 * United States of America
 * American Military
 * American Army
 * American Coast Guard
 * American Marine Corps
 * American Navy
 * American Revenue Cutter Service
 * American-occupied Republic of Cuba
 * American-occupied Republic of Haiti
 * American-occupied Republic of Nicaragua
 * American-occupied RSFSR
 * Bajo Nuevo Bank
 * Guantanamo Bay Naval Base
 * Howland Island
 * Insular Government of the Philippine Islands
 * Johnston Atoll
 * Kingman Reef
 * Midway Atoll
 * Panama Canal Zone
 * Puerto Rico
 * Republic of Cuba (protectorate)
 * Republic of Nicaragua (protectorate)
 * Republic of Panama (protectorate)
 * States
 * Alabama
 * Arizona
 * Arkansas
 * California
 * Colorado
 * Connecticut
 * Delaware
 * Florida
 * Georgia
 * Idaho
 * Illinois
 * Indiana
 * Iowa
 * Kansas
 * Kentucky
 * Louisiana
 * Maine
 * Maryland
 * Massachusetts
 * Michigan
 * Minnesota
 * Mississippi
 * Missouri
 * Montana
 * Nebraska
 * Nevada
 * New Hampshire
 * New Jersey
 * New Mexico
 * New York
 * North Carolina
 * North Dakota
 * Ohio
 * Oklahoma
 * Oregon
 * Pennsylvania
 * Rhode Island
 * South Carolina
 * South Dakota
 * Tennessee
 * Texas
 * Utah
 * Vermont
 * Virginia
 * Washington
 * West Virginia
 * Wisconsin
 * Wyoming
 * Territory of Alaska
 * Territory of American Samoa
 * Territory of Guam
 * Territory of Hawaii
 * United States Virgin Islands
 * Wake Island

Non-state actors

 * Andorran volunteers
 * Arab Revolt (Arab Army)
 * Bedouin
 * Hashemite Kingdom of Hejaz
 * Occupied Enemy Territory Administration
 * Sharifian Army
 * Howeitat
 * Ruwallah
 * Armenian national movement
 * Armenakan Party
 * Armenian fedayi militia
 * Armenian Revolutionary Federation
 * Armenian fedayi militia
 * Armenian National Council
 * Republic of Armenia (First)
 * Social Democrat Hunchakian Party
 * Armenian fedayi militia
 * Assyria
 * Assyrian volunteers
 * Basters under Cornelius van Wyk
 * Iroquois Confederacy
 * Latvian Provisional Government
 * Left SRs
 * Green Armies
 * Black Guards
 * Danylo Terpylo's forces
 * Free Territory (Makhnovia) (Makhnovshchina)
 * Black Army (Revolutionary Isurgent Army of Ukraine) (RIAU)
 * Kholodny Yar Republic
 * Polish Legions
 * Pontic Greeks
 * Supreme War Council
 * White Army (White Guard) (Whites)
 * Mensheviks
 * Russian Social Democratic Labour Party (Mensheviks)
 * Georgian Menshevik Party
 * Transcaucasian Democratic Federative Republic
 * Transcaucasian Seim
 * Transcaucasian-occupied Ottoman Sublime State
 * Transcaucasian-occupied Sublime State of Persia
 * Transcaspian Government
 * Military Dictatorship of Mughan
 * Right SRs
 * Russian Republic
 * All-Russian Constituent Assembly
 * Transcaucasian Commissariat
 * Transcaucasian-occupied Ottoman Sublime State
 * Transcaucasian-occupied Sublime State of Persia
 * Autonomous Governorate of Estonia
 * Russian concession in Tianjin
 * Russian Military
 * Russian Army
 * 700 Cossacks under Pyotr Krasnov
 * Transcaspian Government
 * Russian State
 * Bashkiria
 * Provisional All-Russian Government (PA-RG) (Omsk Directory) (Ufa Directory) (The Directory)
 * Committee of Members of the Constituent Assembly
 * Provisional Siberian Government (Omsk)
 * Provisional Siberian Government (Vladivostok)
 * Ural Provisional Regional Government
 * Russian Armed Forces
 * Russian Air Forces
 * Russian Army
 * Cossacks
 * Baikal Cossacks
 * Transbaikal
 * Kuban Cossacks
 * Orenburg Cossacks (Orenburg Independent Army)
 * Persian Cossack Brigade
 * General Command of the Armed Forces of South Russia (Government of the Commander-in-Chief of the Armed Forces of South Russia)
 * Government of South Russia
 * Army of Wrangel
 * South Russia
 * South Russian Government
 * Turkestan Army
 * Volunteer Army
 * Northern Army
 * Provisional Government of the Northern Region
 * Supreme Administration of the Northern Region
 * Northwestern Army (Northern Corps)
 * Regional Government of Northwest Russia
 * People's Army of Komuch
 * Siberian Army
 * Ural Army
 * Western Army
 * White movement in Transbaikal
 * Far Eastern Army
 * Russian Fleet
 * White émigrés
 * Yakutia
 * Yakuts
 * Zionists

Central Powers and Co-belligerents
The Central Powers were a group of countries opposing the Allies. They were (in order of joining) Austria-Hungary, the German Empire, the Ottoman Empire, and Bulgaria, among others.

List

 * 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 (6–26 August 1914)
 * German East Africa (since 5 August 1914)
 * 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
 * Pskov Independent Volunteers Corps of the Northern Army
 * Villistas
 * Zaian Confederation

State actors

 * Bussa Emirate
 * Crimean People's Republic
 * Free Socialist Republic of Germany
 * Alsace-Lorraine Soviet Republic
 * Bavarian Soviet Republic
 * Bremen Soviet Republic
 * Democratic Republic of Georgia (protectorate)
 * National Council of Georgia
 * German Colonial Empire
 * German East Africa
 * German-occupied Grand Duchy of Luxembourg
 * German-occupied Kingdom of Belgium
 * German-occupied Third French Republic
 * General Governorate of Warsaw
 * Imperial German Army
 * Imperial German Army Air Service
 * VI Reserve Corps
 * Imperial German Navy
 * Constantinople Flotilla
 * Imperial German Naval Air Service
 * Kiautschou Bay Leased Territory
 * States of the German Empire
 * Kingdoms of the German Empire
 * Kingdom of Bavaria
 * Kingdom of Prussia
 * Neutral Moresnet
 * Kingdom of Saxony
 * Kingdom of Württemberg
 * People's State of Bavaria
 * Saxonian Soviet Republic
 * Spartacus League (Spartacists)
 * Würzburg Soviet Republic
 * Supreme Commander of All German Forces in the East (Ober Ost)
 * Bialystok-Grodno District
 * Courland District
 * Lithuania District
 * Territories ceded by Russia
 * Baltic Duchy
 * Baltische Landeswehr
 * Belarusian People's Republic
 * Crimean Regional Government
 * Duchy of Courland and Semigallia
 * Baltische Landeswehr
 * German Estonia
 * Estonian Provisional Government
 * German Latvia
 * Kingdom of Finland
 * Kingdom of Lithuania
 * Ukrainian State (Second Hetmanate)
 * Imamate of Oman
 * Irish Republic
 * Dáil Éireann
 * Fianna Éireann
 * Cumann na mBan
 * Hibernian Rifles
 * Irish Citizen Army
 * Irish Republican Army
 * Irish Republican Brotherhood
 * Irish soviets
 * Limerick Soviet
 * Irish Volunteers
 * Irish Republican Brotherhood
 * Sinn Féin
 * German Realm (Second German Reich)
 * Bermontians
 * Democratic Republic of Georgia (protectorate)
 * National Council of Georgia
 * German Colonial Empire
 * German Concession in Tianjin
 * German East Africa
 * German New Guinea
 * German Kaiser-Wilhelmsland
 * German Samoa
 * German South West Africa
 * South African Republic
 * German West Africa
 * Kamerun
 * German-occupied French Equatorial Africa (Neukamerun)
 * Togoland
 * German-occupied Grand Duchy of Luxembourg
 * German-occupied Kingdom of Belgium
 * German-occupied Russian Empire
 * German-occupied Soviet Republic of Soldiers and Fortress-Builders of Naissaar
 * German-occupied Third French Republic
 * General Governorate of Warsaw
 * Imperial German Army
 * Imperial German Army Air Service
 * VI Reserve Corps
 * Imperial German Navy
 * Constantinople Flotilla
 * Imperial German Naval Air Service
 * Indian independence committee
 * Kiautschou Bay Leased Territory
 * Kingdom of Poland (puppet state)
 * States of the German Empire
 * Imperial Territories
 * Imperial Territory of Alsace-Lorraine
 * Kingdoms of the German Empire
 * Kingdom of Bavaria
 * Kingdom of Prussia
 * Neutral Moresnet
 * Kingdom of Saxony
 * Kingdom of Württemberg
 * Supreme Commander of All German Forces in the East (Ober Ost)
 * Bialystok-Grodno District
 * Courland District
 * Lithuania District
 * Territories ceded by Russia
 * Baltic Duchy
 * Baltische Landeswehr
 * Belarusian People's Republic
 * Crimean Regional Government
 * Duchy of Courland and Semigallia
 * Baltische Landeswehr
 * German Estonia
 * Estonian Provisional Government
 * German-occupied Don Republic (Don Cossacks)
 * Don Army
 * Southern Army
 * Kingdom of Lithuania
 * Ukrainian State (Second Hetmanate)
 * Council of People's Ministers
 * Southern Army
 * Volunteer Army
 * Ukrainian People's Republic (German occupation zone)
 * Central Rada of Ukraine
 * Council of People's Ministers
 * General Secretariat of Ukraine
 * Free Cossacks
 * Ukrainian People's Army
 * White Finland (Republic of Finland/Kingdom of Finland)
 * Civil Guard (White Guard)
 * The Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of St. Stephen
 * Austrian Colonial Empire
 * Austrian Concession in Tianjin (Austro-Hungarian concession of Tianjin)
 * Franz Josef Land (unofficial)
 * Austrian-occupied Kingdom of Italy
 * Austrian-occupied Kingdom of Serbia
 * Austro-Hungarian Military
 * Austro-Hungarian Air Force
 * Austro-Hungarian Army
 * Austro-Hungarian Navy
 * Danube Flotilla
 * Kingdom of Poland (puppet state)
 * Lands of the Crown of Saint Stephen
 * Condominium of Bosnia and Herzegovina
 * Kingdom of Croatia-Slavonia
 * Kingdom of Hungary
 * Principality of Transylvania
 * The Kingdoms and Lands Represented in the Imperial Council (Cisleithania)
 * Condominium of Bosnia and Herzegovina
 * Municipalities
 * Austrian Littoral
 * County of Tyrol
 * Crown Land of Salzburg
 * Duchy of Bukovina
 * Duchy of Carinthia
 * Duchy of Carniola
 * Duchy of Styria
 * Duchy of Upper and Lower Silesia
 * Imperial Free City of Trieste
 * Lands of the Bohemian Crown
 * Kingdom of Bohemia
 * Margraviate of Moravia
 * Kingdom of Dalmatia
 * Kingdom of Galicia and Lodomeria
 * Princely County of Gorizia and Gradisca
 * Ukrainian People's Republic (Austrian occupation zone)
 * Central Rada of Ukraine
 * Council of People's Ministers
 * General Secretariat of Ukraine
 * Free Cossacks
 * Ukrainian People's Army
 * The Sublime Ottoman State
 * Damascus Eyalet
 * Kars Republic (protectorate)
 * Minor allies of the Ottoman Empire
 * Ahl Haydara Mansur
 * 'Anazzah
 * Azerbaijan Democratic Republic
 * Basmachi
 * Khanate of Khiva under Junaid Khan
 * Central Asian revolt of 1916 (Turkic tribal confederations)
 * Kyrgyz rebels
 * Kazakh rebels
 * Dervish state
 * Emirate of Jabal Shammar
 * Ethiopian Empire (Lij Iyasu loyalists)
 * Mountain Republic (Mountainous Republic of the Northern Caucasus) (MRNC) (Republic of the Mountaineers) (United Republics of the North Caucasus)
 * North Caucasian Emirate
 * Republic of Aras
 * Senussi order
 * Shekak tribe
 * Sultanate of Darfur
 * Ottoman Arabia
 * Ottoman Military
 * Ottoman Army
 * Eastern Army Group
 * Islamic Army of the Caucasus
 * Ottoman Aviation Squadrons
 * Ottoman Navy
 * Ottoman-occupied Sublime State of Persia
 * Ottoman-occupied Republic of Armenia
 * Ottoman-occupied Russian Empire
 * Ottoman-occupied Sultanate of Egypt
 * Ottoman-occupied Transcaucasian Democratic Federative Republic
 * Territories ceded by Russia
 * Yemen Vilayet
 * Tsardom of Bulgaria
 * Bulgarian-occupied Kingdom of Greece
 * Bulgarian-occupied Kingdom of Serbia
 * Bulgarian occupation zone of Serbia
 * Bulgarian occupied Principality of Albania
 * Internal Macedonian Revolutionary Organization (IMRO)
 * Weimar Republic
 * Democratic Republic of Georgia (protectorate)
 * National Council of Georgia
 * Free State of Bavaria
 * Free State of Prussia
 * German Colonial Empire
 * German East Africa
 * German-occupied Grand Duchy of Luxembourg
 * German-occupied Kingdom of Belgium
 * German-occupied Third French Republic
 * General Governorate of Warsaw
 * Imperial German Army
 * Freikorps
 * Freikorps in the Baltic (Iron Division)
 * Baltic Duchy
 * Baltische Landeswehr
 * Duchy of Courland and Semigallia
 * Baltische Landeswehr
 * German Estonia
 * Pro-German government in Latvia under Andrievs Niedra
 * Imperial German Army Air Service
 * VI Reserve Corps
 * Imperial German Navy
 * Constantinople Flotilla
 * Imperial German Naval Air Service
 * Kiautschou Bay Leased Territory
 * States of the German Empire
 * Kingdoms of the German Empire
 * Kingdom of Bavaria
 * Kingdom of Prussia
 * Neutral Moresnet
 * Kingdom of Saxony
 * Kingdom of Württemberg
 * Supreme Commander of All German Forces in the East (Ober Ost)
 * Bialystok-Grodno District
 * Courland District
 * Lithuania District
 * Territories ceded by Russia
 * Belarusian People's Republic
 * Crimean Regional Government
 * Kingdom of Finland
 * Kingdom of Lithuania
 * Ukrainian State (Second Hetmanate)

Non-state actors

 * Aulihan
 * Barue rebels
 * Berbers
 * Tuaregs
 * Ag Kaocen's forces
 * Zayan Confederation
 * Cacos (Charlemagne Péralte's forces)
 * Conventionists
 * División del Norte
 * Villistas
 * Liberation Army of the South (Zapatistas)
 * Egba rebels
 * Green Armies
 * Indian revolutionaries
 * Anushilan Samiti
 * Ghadar Movement
 * Indian independence committee
 * Iranian rebels
 * Achomi people
 * Dashti people
 * Democrat Party
 * Dowlat Movaqat Melli (Provisional National Government)
 * Jangal Movement
 * Gilan Soviet Republic (Persian SSR)
 * Persian Central Government Gendarmerie
 * Pro-German government of Shiraz under Mehdi Qoli Hedayat
 * Qashqai people
 * John Chilembwe's forces
 * Makonde people
 * Manchu Restoration
 * Ministry of War of the Dominican Republic under Desiderio Arias
 * Phu Mi Bun movement
 * Polish Legions
 * Volta-Bani Rebels
 * Bwa
 * Lela
 * Mandé
 * Bobo
 * Marka
 * Nuna
 * White Army (White Guard) (Whites)
 * Mensheviks
 * Russian Social Democratic Labour Party (Mensheviks)
 * Georgian Menshevik Party
 * Democratic Republic of Georgia
 * Russian State
 * Russian Armed Forces
 * Russian Air Forces
 * Russian Army
 * Bermontians
 * Cossacks
 * Don Cossacks
 * Kuban Cossacks
 * General Command of the Armed Forces of South Russia (Government of the Commander-in-Chief of the Armed Forces of South Russia)
 * Armed Forces of South Russia
 * Don Republic (Don Cossacks)
 * Don Army
 * Southern Army
 * Don Host Oblast
 * Kuban People's Republic (Kuban Cossacks)
 * Caucasus Army
 * Kuban Rada
 * Crimean Regional Government
 * Northwestern Army (Northern Corps)
 * Regional Government of Northwest Russia
 * White émigrés
 * Yakutia
 * Yakuts

Neutral countries

 * Declared neutral colonies, condominiums, countries, occupations, protectorates, and territories
 * Kingdom of Denmark
 * Danish West Indies
 * Greenland
 * Iceland
 * Kingdom of Norway
 * Bouvet Island
 * Peter I Island
 * Sverdrup Islands
 * Kingdom of Spain
 * Cape Juby Strip
 * Ifni Protectorate
 * Spanish Guinea
 * Spanish protectorate in Morocco
 * Spanish Sahara
 * Kingdom of Sweden
 * Kingdom of the Netherlands
 * Curaçao and Dependencies
 * Dutch East Indies
 * Surinam
 * Sublime State of Persia
 * Swiss Confederation


 * De facto neutral colonies, condominiums, countries, occupations, protectorates, and territories


 * Argentine Republic
 * Banat Republic
 * Bogd Khanate of Outer Mongolia
 * Chokwe Kingdom
 * Emirate of Afghanistan
 * Emirate of Bukhara
 * Empire of China
 * Ethiopian Empire
 * Free State of Bottleneck
 * Grand Duchy of Luxembourg
 * Hungary
 * Hungarian National Council
 * Idel-Ural State
 * Karakorum Government
 * Khanate of Khiva
 * Kingdom of Bhutan
 * Komancza Republic
 * Moldavian Democratic Republic
 * Mutawakkilite Kingdom of Yemen
 * Peruvian Republic
 * Principality of Liechtenstein
 * Principality of Monaco
 * Radomir Republic
 * Republic of Bolivia
 * Republic of Chile
 * Republic of Colombia
 * Republic of Ecuador
 * Republic of El Salvador
 * Republic of Estonia
 * Republic of Lithuania
 * Republic of Paraguay
 * Republic of Tarnobrzeg
 * Shanghai International Settlement
 * Sheikdom of Upper Asir
 * Spitsbergen
 * Sultanate of Sulu
 * Tibet
 * The Kingdoms and Lands Represented in the Imperial Council
 * United Mexican States
 * United States of Venezuela


 * Non-state actors
 * Aboriginal Australians
 * Chukchi people
 * Cinta Larga
 * Cuanhama
 * Guangdong
 * Guangxi
 * Guizhou
 * Hunan
 * Inuit
 * Kimbundu people
 * Lunda people
 * Ma clique
 * Gansu
 * Ningxia
 * Qinghai
 * Nganasan people
 * Oaxaca
 * Papuan people


 * Reguibat tribe


 * Semirechye Cossacks
 * Shanxi clique
 * Siberian Cossacks
 * Sichuan clique
 * Turkana people
 * Xinjiang clique
 * Yanomami

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.