List of wars 1900–1944

1900-1919

1900-1919

Start	Finish	Name of Conflict	Belligerents
			Victorious party (if applicable)	Defeated party (if applicable)
1900	1900	War of the Golden Stool	United Kingdom	Ashanti Empire
1901	1902	Anglo-Aro War	United Kingdom	Aro Confederacy
1902	1932	Unification of Saudi Arabia	Sultanate of Nejd Allied Arab clans	Al Rashid Ottoman Empire Kingdom of Hejaz
1903	1904	British expedition to Tibet	United Kingdom	Tibet
1904	1907	Herero War	German Empire (including German colonial forces)	Herero and Namaqua peoples
1904	1905	Russo-Japanese War	Empire of Japan	Russian Empire Principality of Montenegro
1905	1905	1905 Russian Revolution	Russian Empire	Revolutionaries
1906	1906	Dutch intervention in Bali	The Netherlands	Badung Tabanan Klungkung
1906	1906	Bambatha Rebellion	British Empire	Zulu
1907	1907	1907 Romanian Peasants' Revolt	Kingdom of Romania
1908	1908	Dutch intervention in Bali	The Netherlands	Karangasem Klungkung Gelgel
1908	1909	Persian Civil War	Persia
1908	1908	Dutch-Venezuela War	The Netherlands	Venezuela
1909	1910	Second Melillan campaign	Spain	Riffian tribesmen
1909	1911	Wadai War	France	Ouaddai Empire
1910	1921	Mexican Revolution	Mexico
1910	1919	Border War (1910–1919) Part of the Mexican Revolution
1911	1912	French conquest of Morocco	France	Morocco
1911	1912	Italo-Turkish War	Kingdom of Italy	Ottoman Empire
1911	1912	Xinhai Revolution 1911 Revolution	Tongmenghui	Qing Empire of China
1912	1913	First Balkan War	Kingdom of Bulgaria Kingdom of Greece Kingdom of Serbia Kingdom of Montenegro	Ottoman Empire
1912	1916	Contestado War	Brazilian Governists	Rebels
1912	1933	United States occupation of Nicaragua Part of the Banana Wars	United States	Nicaraguan rebels
1913	1913	Second Balkan War	Ottoman Empire Kingdom of Greece Kingdom of Serbia Kingdom of Montenegro Kingdom of Romania	Kingdom of Bulgaria
1914	1918 (Armistice) 1919 (Treaty)	World War I	Triple Entente: Kingdom of Belgium Kingdom of Serbia France Russian Empire (until March 1918) British Empire Kingdom of Italy (from April 1915) Canada United States (from 1917) Kingdom of Montenegro Empire of Japan Portuguese Republic (from March 1916) Kingdom of Romania (August 1916-May 1918) Kingdom of Greece (from June 1917) Albania Brazil (from October 1917) Armenia (from May 1918) Czechoslovakia Finland (from October 1918r) Kingdom of Siam San Marino (from June 1915) Republic of China(from August 1917)	Central Powers: Austro-Hungarian Empire German Empire (including German colonial forces) Ottoman Empire Kingdom of Bulgaria
1914	1914	United States occupation of Veracruz Part of the Banana Wars	United States	Mexico
1914	1915	Maritz Rebellion	Union of South Africa	"Bitterenders"
1915	1934	United States occupation of Haiti Part of the Banana Wars	United States	Haiti
1915	1917	Senussi Campaign Part of World War I	British Empire	Senussi Ottoman Empire Darfur Emirate
1916	1917	Kaocen Revolt	France	Tuareg guerrillas
1916	1916	Easter Rising	British Army Dublin Metropolitan Police Royal Irish Constabulary	Irish Republican Brotherhood Irish Volunteers Irish Citizen Army Cumann na mBan Hibernian Rifles Fianna Éireann
1916	1924	United States occupation of the Dominican Republic (1916–1924) Part of the Banana Wars	United States	Dominican rebels
1916	1917	National Protection War Anti-Monarchy War'	Republic of China	Empire of China
1916	1918	Arab Revolt Part of World War I	Hashemite Arabs United Kingdom Sultanate of Nejd (Unification of Saudi Arabia)	Ottoman Empire
1917	1917	February Revolution	Russian revolutionaries	Russian Empire
1917	1917	October Revolution	Bolsheviks	Russian Provisional Government
1917	1923	Russian Civil War	Communist Forces: Russian SFSR Ukrainian SSR Revolutionary Insurrectionary Army of Ukraine	White Movement Central Powers (until 1918): Austro-Hungarian Empire German Empire (including German colonial forces) Ottoman Empire Allied Forces (from 1918): Czechoslovakia Republic of China Estonia Finland France Kingdom of Greece Kingdom of Italy Empire of Japan Latvia Lithuania Poland Kingdom of Romania Kingdom of Serbia United Kingdom Australia Canada United States
1917	1918	Soviet-Turkish War (1917-1918) Part of Russian Civil War	Ottoman Empire	Russian SFSR
1917	1921	Ukrainian War of Independence Part of World War I and Russian Civil War	Ukrainian SSR Russian SFSR	Ukrainian People's Republic West Ukrainian People's Republic White Movement
1918	1918	Finnish Civil War Part of World War I and Russian Civil War	Finnish White Guards German Empire	Finnish Red Guards Russian SFSR
1918	1918	Georgian–Armenian War	Democratic Republic of Georgia	Democratic Republic of Armenia
1918	1919	German Revolution of 1918–1919	German Empire Weimar Republic	Communist Forces: Bavarian Soviet Republic Spartacus League German Communist movements
1918	1919	Greater Poland Uprising (1918–1919)	Poland	German Empire
1918	1919	Polish–Ukrainian War part of the Ukrainian War of Independence	Poland	West Ukrainian People's Republic
1918	1920	Georgian–Ossetian conflict (1918–1920)	Transcaucasian Democratic Federative Republic Democratic Republic of Georgia	Pro-Bolshevik Ossetian rebels
1918	1920	Armenian–Azerbaijani War Part of the Russian Civil War	Azerbaijan Democratic Republic Ottoman Empire (1918 only) Russian SFSR (from April 1920) Turkish Revolutionaries (from April 1920)	Democratic Republic of Armenia Republic of Mountainous Armenia Nagorno-Karabakh rebels British Empire (1918 only) Centrocaspian Dictatorship (1918 only)
1918	1920	Estonian War of Independence Part of the Russian Civil War	Estonia White Russia Latvia United Kingdom Ingria Ober Ost Finnish, Swedish and Danish volunteers	Russian SFSR Estonian Commune Latvian SSR
1918	1920	Latvian War of Independence Part of the Russian Civil War	Latvia Estonia Poland United Kingdom France	Russian SFSR Latvian SSR
1918	1919	Lithuanian–Soviet War Part of the Lithuanian Wars of Independence	Lithuania Saxon volunteers	Russian Soviet Federative Socialist Republic Lithuanian-Belorussian Soviet Socialist Republic

1919-1929

1919-1929

Start	Finish	Name of Conflict	Belligerents
			Victorious party (if applicable)	Defeated party (if applicable)
1919	1919	Lithuanian War of Independence (War against the Bermontians) Part of the Lithuanian Wars of Independence	Lithuania	West Russian Volunteer Army
1919	1919	Polish–Czechoslovak War	Czechoslovakia	Second Polish Republic
1919	1919	Hungarian–Romanian War of 1919	Romania	Hungarian Soviet Republic
1919	1922 (Armistice) 1923 (Treaty)	Turkish War of Independence	Grand National Assembly Kuva-yi Milliye	Greece France Armenia Italy United Kingdom
1919	1919	Third Anglo-Afghan War	Afghanistan	British Empire India
1919	1919	Portuguese Monarchist Civil War	Portuguese Republican Party	Kingdom of Portugal
1919	1920	Italo-Yugoslav War	Kingdom of Italy Free State of Fiume	Kingdom of Serbs, Croats and Slovenes
1919	1921	Polish–Soviet War Part of the Russian Civil War	Republic of Poland Ukrainian People's Republic	Russian SFSR Ukrainian SSR
1919	1919	First Silesian Uprising Part of the Silesian Uprisings	Weimar Republic	Silesian Rebels
1919	1921	Franco-Syrian War	France French Syria	Syrian Rebels
1919	1921	Irish War of Independence	Irish Republic	United Kingdom
1919	1922	Greco-Turkish War (1919–1922)	Turkish Revolutionaries	Kingdom of Greece
1920	1921	Franco-Turkish War	Turkey	France French Armenian Legion
1920	1920	Vlora War	Principality of Albania	Kingdom of Italy
1920	1926	Rif War	France Spain	Rif Republic
1920	1920	Polish–Lithuanian War Part of the Lithuanian Wars of Independence	Poland	Lithuania
1920	1920	Second Silesian Uprising Part of the Silesian Uprisings	Weimar Republic	German civil government and police of Upper Silesia
1920	1920	Turkish–Armenian War	Turkish Revolutionaries	Democratic Republic of Armenia
1920	1920	Zhili–Anhui War	Zhili clique Fengtian clique	Anhui clique
1920	1921	Guangdong–Guangxi War	Old Guangxi clique	Chinese Revolutionary Party
1921	1921	Red Army invasion of Georgia Part of the Russian Civil War	Russian SFSR Turkish revolutionaries	Democratic Republic of Georgia
1921	1921	Third Silesian Uprising Part of the Silesian Uprisings	Weimar Republic	Silesian Rebels Poland
1921	1922	East Karelian Uprising Part of the Russian Civil War	Russian SFSR	Finnish and East Karelian rebels
1922	1922	First Zhili–Fengtian War	Zhili clique	Fengtian clique
1922	1923	Irish Civil War	Pro-treaty forces	Anti-treaty forces
1924	1924	August Uprising	Soviet Union	Committee for Independence of Georgia
1924	1924	Second Saud–Sharif War	Saudi Arabia British Empire	Hejaz
1924	1924	Second Zhili–Fengtian War	Fengtian clique	Zhili clique
1925	1925	Incident at Petrich	Kingdom of Bulgaria	Kingdom of Greece
1926	1928	Northern Expedition	Republic of China	Beiyang Government
1926	1929	Cristero War	Mexico	Cristeros
1927	1950	Chinese Civil War	Communist Party of China After 1949: People's Republic of China	Nationalist Party of China Republic of China After 1949: Republic of China on Taiwan
1928	1929	Afghan Civil War	Barakzai dynasty Tribal supporters British Empire (from 1929)	Tribal rebels Forces of Habibullah Ghazi
1929	1929	Sino-Soviet conflict (1929)	Soviet Union	Republic of China
1929	1930	Igbo Women's War	Igbo Women of Owerri and Calabar Provinces	Warrant Chiefs British Colonial Forces

1930-1944

1930-1944

Start	Finish	Name of Conflict	Belligerents
			Victorious party (if applicable)	Defeated party (if applicable)
1930	1930	Yen Bai mutiny	French Indochina	VNQDD
1930	1930	Central Plains War Part of Chinese Civil War	Forces of Chiang Kai-shek	Forces of the coalition of Yan Xishan, Feng Yuxiang, Wang Jingwei, and Li Zongren
1930	1932	Sino-Tibetan War	Republic of China	Tibet
1931	1932	Japanese invasion of Manchuria	Empire of Japan	Republic of China
1931	1934	Kumul Rebellion	Republic of China	First East Turkestan Republic
1932	1932	Ecuadorian Civil War	Ecuador
1932	1932	Shanghai War of 1932	Republic of China	Empire of Japan
1932	1935	Chaco War	Paraguay	Bolivia
1932	1933	Colombia-Peru War	Colombia	Peru
1934	1934	Soviet invasion of Xinjiang	Republic of China	Soviet Union White Russian forces Torgut Mongols
1934	1934	Austrian Civil War	First Austrian Republic Fatherland's Front	Social Democratic Party of Austria
1934	1934	Saudi-Yemeni War	Saudi Arabia	Yemen
1935	1936	Second Italo-Abyssinian War	Kingdom of Italy	Ethiopian Empire
1936	1939	Great Arab Revolt in Palestine	United Kingdom British Army Palestine Police Force Jewish Settlement Police Jewish Supernumerary Police Haganah Special Night Squads FOSH Peulot Meyuhadot Irgun Peace Bands	Arab Higher Committee
1936	1939	Spanish Civil War	National faction Falange Carlists (1936–1937) CEDA (1936–1937) Alfonsists (1936–1937) Army of Africa Supported by: Italy Germany Portugal Foreign volunteers	Republican faction Popular Front CNT/FAI UGT ERC Basque Army (1936–1937) Galicianist Party Supported by: International Brigades Soviet Union (1936–1938) Mexico France (1936)
1937	1937	Islamic rebellion in Xinjiang (1937)	Soviet Union White Russian forces	Republic of China
1937	1945	Second Sino-Japanese War Part of World War II	Republic of China Communist Party of China United States (from 1941) British Empire (from 1941)	Empire of Japan Manchukuo
1938	1948	British–Zionist conflict	Jewish Resistance Movement Haganah Irgun Lehi	British Army Royal Navy Royal Air Force Palestine Police Force
1938	1938	Battle of Lake Khasan	Soviet Union	Manchukuo Empire of Japan
1939	1939	Hungarian Invasion of the Carpatho-Ukraine	Kingdom of Hungary	Carpatho-Ukraine
1939	1939	Slovak–Hungarian War	Kingdom of Hungary	Slovak Republic
1939	1939	Italian invasion of Albania	Kingdom of Italy	Albanian Kingdom
1939	1939	Battle of Khalkhin Gol	Soviet Union Mongolia	Empire of Japan Manchukuo
1939	1945	World War II	Allied Powers: From 1939 Poland Australia France New Zealand British Empire Nepal South Africa Canada Czechoslovakia (government-in-exile) From 1940 Norway Belgium Luxembourg Netherlands Free France Kingdom of Greece Kingdom of Yugoslavia From 1941 Soviet Union Panama Costa Rica Dominican Republic El Salvador Haiti Honduras Nicaragua United States Republic of China Guatemala Cuba Philippines From 1942 Indian Empire Mexico Brazil Ethiopia From 1943 Iraq Bolivia Colombia Iran Yugoslavia From 1944 Liberia Peru Kingdom of Italy (since 1943. Formerly a member of the Axis) Kingdom of Romania (formerly a member of the Axis) Bulgaria (formerly a member of the Axis) San Marino (formerly a member of the Axis) Albania 1945 Only Ecuador Paraguay Uruguay Venezuela Turkey Egypt Lebanon Syria Saudi Arabia Argentina Chile	Axis Powers: Nazi Germany Kingdom of Italy (1940–1943) Hungary (from 1940) Empire of Japan (from 1941) Bulgaria (1940–1944) Independent State of Croatia (from 1941) Kingdom of Romania (1941–1944) Italian Social Republic (1943-1945) Non-Axis Co-belligerents: Manchukuo Mengjiang China-Nanjing San Marino (1940-1943) Vichy France (1940-1944) Finland (1941–1944) Kingdom of Iraq (1941 only) Thailand (1942–1945)
1939	1940	Winter War Part of World War II	Soviet Union	Finland
1940	1941	Franco-Thai War Part of World War II	Thailand	Vichy France French Indochina
1940	1941	Greco-Italian War Part of World War II	Greece	Kingdom of Italy
1941	1941	Ecuadorian–Peruvian War	Peru	Ecuador
1941	1941	Anglo-Iraqi War Part of World War II	United Kingdom British India Palestine	Kingdom of Iraq Nazi Germany Kingdom of Italy
1941	1944	Continuation War Part of World War II	Soviet Union United Kingdom	Finland Nazi Germany Kingdom of Italy
1943	1943	Warsaw Ghetto Uprising Part of World War II and The Holocaust	Nazi Germany (Waffen-SS, SD, OrPo, Gestapo, Wehrmacht) Collaborators (Latvian police, Jewish police, Polish police, Lithuanian police, Ukrainian volunteers)	Jewish resistance ŻOB ŻZW Polish resistance AK (Home Army) GL (People's Guard)
1944	1945	Lapland War Part of World War II	Finland	Nazi Germany
1944	1953	Guerilla war in the Baltic states	Soviet Union	The Forest Brothers
1944	1949	Ili Rebellion	Communist Party of China Second East Turkestan Republic Soviet Union White Russian forces Mongolian People's Republic	Republic of China National Revolutionary Army