List of wars involving the United Kingdom

This is a list of conflicts involving the United Kingdom of Great Britain and Northern Ireland and its predecessors the United Kingdom of Great Britain and Ireland and the Kingdom of Great Britain.

The Kingdom of Great Britain was formed in 1707 through the Acts of Union 1707, which united the kingdoms of England and Scotland into a single kingdom encompassing the whole island of Great Britain and its outlying islands. It did not include the Kingdom of Ireland, which remained a separate realm. On 1 January 1801, the kingdoms of Great Britain and Ireland were merged to form the United Kingdom of Great Britain and Ireland. In 1922, five-sixths of Ireland seceded from the United Kingdom and the state was renamed the United Kingdom of Great Britain and Northern Ireland.

During its history, British forces or forces with a British mandate have invaded, had some control over or fought conflicts in 171 of the world's 193 countries that are currently UN member states, or nine out of ten of all countries (or 89% of UN Nations).

  British victory

  British defeat

  Another result (e.g. a treaty or peace without a clear result, status quo ante bellum, result of civil or internal conflict, result unknown or indecisive)

  Ongoing conflict

Kingdom of Great Britain (1707–1801)

Conflict	Britain & Her Allies	Belligerents Opposing Britain	Outcome
The Great Northern War (1700–1721)	Tsardom of Russia Kalmyk Khanate Cossack Hetmanate Denmark–Norway Electorate of Saxony Poland–Lithuania Prussia Hanover	Swedish Empire Ottoman Empire United Provinces Brunswick-Lüneburg	Coalition victory: Tsardom of Russia establishes itself as a new power in Europe. Decline of Swedish Empire and the Polish–Lithuanian Commonwealth.
The War of the Spanish Succession (1701–1714) including Queen Anne's War	Austria Dutch Republic Savoy Prussia Portugal	France Spain Bavaria Hungarians	Grand Alliance Victory: Treaty of Utrecht: Territory in Canada and the West Indies ceded from France Territory in Europe ceded from Spain
Civil War: (1715–1716) Jacobite rising of 1715 including the uprising in Cornwall	Government forces	Jacobites France	Victory Jacobite restoration attempt defeated
The War of the Quadruple Alliance including The Nineteen Uprising in Britain (1717–1720)	Holy Roman Empire France Dutch Republic Savoy	Spain Jacobites (against the British Crown and Government only)	Quadruple Alliance Victory: Jacobite restoration attempt defeated Treaty of The Hague: Spanish attempt at expansion fails.
Dummer's War (1721–1725)	New England Colonies Mohawk	France Wabanaki Confederacy	Victory Britain recognises the rights of the region's indigenous inhabitants.
The War of the Austrian Succession (1740–1748) including King George's War The War of Jenkins' Ear (Start 1739) The First Carnatic War	Austria Hanover Dutch Republic Saxony Sardinia Russia East India Company	France Prussia Spain Spanish Empire Bavaria Saxony Naples and Sicily Genoa Sweden French East India Company	Treaty of Aix-la-Chapelle: Status quo ante bellum
Civil War: Jacobite rising of 1745 (1741–1745)	Government forces	Jacobites France	Victory Jacobite restoration attempt defeated
The Second Carnatic War (1749–1754)	East India Company Forces of Nasir Jang Mir Ahmad Forces of Mohamed Ali Khan Walajan	French East India Company Forces of Chanda Shahib Forces of Muhyi ad-Din Muzaffar Jang Hidayat	Victory Treaty of Pondicherry: Pro-British Mohamed Ali Khan Walajan became Nawab of the Carnatic
Seven Years' War (1756–1763)	Prussia Hanover Iroquois Portugal and her colonies Brunswick-Wolfenbüttel Hesse-Kassel Schaumburg-Lippe	France French Empire Holy Roman Empire Russian Empire Sweden Spain Spanish Empire Saxony Sardinia Mughal Empire	Victory Treaty of Paris: Extensive North American lands (incl. all of Canada) ceded from France Caribbean colonies ceded from France Senagal River colony (excluding Gorée) ceded from France Florida ceded from Spain
The Third Carnatic War (1757–1763)	East India Company	France French East India Company	Victory Treaty of Paris: French trading posts in India administered by British Sumatra ceded from France
Anglo-Cherokee War (1758–1761)	Great Britain	Cherokee	Victory Pro-British Attakullakulla becomes Cherokee leader
Tacky's War (1760)	Great Britain Jamaican Government Jamaican Maroons	Ashanti Slaves	Victory Slave defeat Death of Tacky Tacky's men committed suicide
Pontiac's Rebellion (1763–1766)		Confederation of First Nation Tribes	Stalemate British policy change British suzerainty over First Nation Tribes Niagara Falls area ceded from Seneca Nation
First Anglo-Mysore War (1766–1769)	East India Company Maratha Empire Hyderabad State	Kingdom of Mysore	British defeat, Hyderabad cedes territory to Mysore
First Anglo-Maratha War (1774–1783)	East India Company	Maratha Empire	Indecisive Pre-war status quo remained. Treaty of Salbai: Maratha support for Britain against Mysore
War of American Independence (1775–83) Anglo-French War (1778–83) Anglo-Spanish War (1779–83) 4th Anglo-Dutch War (1780–83)	Iroquois Cherokee Hanover Loyalists	United States France Spain Dutch Republic Vermont Republic Kingdom of Mysore Oneida tribe Tuscarora tribe Watauga Association Catawba tribe	Defeat Treaty of Paris: 13 North American colonies recognised as the independent United States of America Territory in North America ceded to the newly independent United States of America Senegal River colony returned to France French recognises British suzerainty over the Gambia river Territory in India returned to France Minorca ceded to Spain East & West Florida ceded to Spain All British settlers to be expelled from Florida De-militarisation of British Honduras Territory in India ceded by the Dutch
2nd Anglo-Mysore War (1780–1784)	East India Company Maratha Empire Hyderabad State	Kingdom of Mysore France	Treaty of Mangalore: Status quo ante bellum
Northwest Indian War (1785–1795)	Western Confederacy	United States	Defeat Treaty of Greenville British withdrawal American occupation of the Northwest Territory
3rd Anglo-Mysore War (1789–1792)	East India Company Maratha Empire Hyderabad State Travancore	Kingdom of Mysore Kingdom of France	Victory Treaty of Seringapatam: Half of Mysore territory ceded to East India Company
War of the French Revolution (1793–1802)	Austria Prussia French Royalists Dutch Republic Spain Kingdom of Portugal Kingdom of Sardinia Naples and Sicily Italian states Ottoman Empire Russia	French Republic Polish Legions Denmark–Norway Spain Sister republics: Batavian Republic Helvetic Republic Cisalpine Republic Roman Republic Parthenopaean Republic	Defeat Treaty of Amiens: General French victory Britain recognises the French Republic Cape Colony returned to the Batavian Republic British withdrawal from Egypt French withdrawal from the Papal States Trinidad and Tobago ceded from France Ceylon ceded from the Batavian Republic
Ibn Ufaisan's Invasion (1793)	Kuwait Great Britain British East India Company	Emirate of Diriyah	Victory Saudi retreat from Kuwait.
Second Maroon War (1795–1796)	Great Britain British Jamaica	Jamaican Maroons	Victory Maroon defeat Treaty signed established that the Maroons would beg on their knees for the King's forgiveness, return all runaway slaves, and be relocated elsewhere in Jamaica Breach of treaty caused deportation of several Maroons to Nova Scotia and later to Sierra Leone in Africa
Hawkesbury and Nepean Wars (1795–1816)	Burrberongal Tribe Great Britain from 1801: United Kingdom of Great Britain and Ireland	Dharug Eora Tharawal Gandangara Irish-convict sympathisers	Victory Displacement of Aborigines from their land
Kandyan Wars (1796–1818)	Great Britain from 1801: United Kingdom of Great Britain and Ireland	Kingdom of Kandy	Victory End of 2357 years of Sinhalese independence
Irish Rebellion of 1798 (1798)	Kingdom of Ireland	United Irishmen Defenders French Republic	Victory Rebellion defeated 1801 Act of Union
4th Anglo-Mysore War (1798–1799)	East India Company Maratha Empire Hyderabad State	Kingdom of Mysore French Republic	Victory Complete annexation of Mysore by Britain and allies

United Kingdom of Great Britain and Ireland (1801–1922)

Conflict	Britain & Her Allies	Belligerents Opposing Britain	Outcome
Temne War (1801–1807)	Susu tribes	Kingdom of Koya	Victory Northern shore of Sierra Leone ceded by Koya
Tunisian-Sicilian War (1801-1804)	Kingdom of Sicily Albanian, German, and Greek mercenaries Kingdom of Sardinia (from 1802) United Kingdom	Beylik of Tunis Tunisian pirates Regency of Algiers Eyalet of Tripolitania (from 1803)	Victory End of Tunisian attacks on Sicilian ships and impression on sailors. Sicilian occupation of Aryanah and La Goulette until 1808. Sardinian occupation of Bizerte and La Marsa until 1809. 3,560 captured Christian-European slaves released.
Second Anglo-Maratha War (1802–1805)	East India Company	Maratha Empire	Victory Extensive territory in India ceded by the Maratha Empire
First Kandyan War (1803–1805)		Kandy	Victory Territory captured from Kandy
Civil War: Emmet's Insurrection (1803)		Forces of Robert Emmet	Victory Rebellion defeated
British Expedition to Ceylon (1803)	Dutch Republic United Kingdom	Chiefdom of Vanni Kingdom of Kandy	Victory Vanni region lost to the British The last Tamil resistance against colonial rule was crushed.
War of the Third Coalition (1803–1805)	Austrian Empire Russian Empire Naples and Sicily Portugal Sweden	French Empire Batavia Italy Etruria Spain Bavaria Württemberg	?? Fourth Peace of Preßburg: French victory Austria surrenders to France Pro-French Confederation of the Rhine formed
War of the Fourth Coalition (1806–1807)	Prussia Russia Saxony Sweden Sicily	French Empire Confederation of the Rhine Bavaria Württemberg Polish Legions Italy Naples Etruria Holland Swiss Confederation Spain	Treaties of Tilsit: French victory Half of Prussia ceded to French allies Russia exits the war Anglo-Russian War begins
British invasions of the Río de la Plata (1806–1807)		Spain River Plate Viceroyalty	Invasion defeated
Ashanti-Fante War (1806–1807)	Ashanti Empire	Fante Confederacy Dutch Empire
Anglo-Turkish War (1807–1809)		Ottoman Empire	Treaty of the Dardanelles: Turkish Military victory Commercial and legal concessions to British interests within the Ottoman Empire Promise to protect the empire against French encroachment
Gunboat War (1807–1814)	United Kingdom	Denmark-Norway	Victory Treaty of Kiel: Denmark and Norway split up Heligoland ceded from Denmark
Anglo-Russian War (1807–1812)	United Kingdom	Russian Empire	Treaty of Örebro: Anglo-Russian-Swedish pact against France
Peninsular War (1807–1814)	Spain Portugal	French Empire	Victory Treaty of Paris: Bourbon dynasty restored Tobago, St. Lucia, Mautitius ceded from France All other French possessions restored as per 1792 borders Abolition of French Slave Trade Swiss independence
War of the Fifth Coalition (1809)	Austrian Empire Tyrol Hungary Black Brunswickers Sicily Sardinia	French Empire Warsaw Confederation of the Rhine Bavaria Saxony Württemberg Westphalia Kingdom of Italy Naples Swiss Confederation Holland	?? Treaty of Schönbrunn: Complete Austrian surrender Peninsular War continued
Conquest of French Guiana (1809)	Portugal Colonial Brazil United Kingdom	France	Victory French Guiana occupied by Portugal until 1817.
Merina Conquest of Madagascar (1810–1817)	Merina Kingdom	French Empire	Victory Merina control of Madagascar Merina pro-British policies
Punjab War (1810–1820)	East India Company	Sikh Empire	Defeat Status quo ante bellum
4th Xhosa War (1811–1812)		Xhosa tribes	Victory Xhosa tribes pushed beyond the Fish River, reversing their gains in the previous Xhosa wars
Ga-Fante War (1811)	Ashanti Empire Ga tribes Dutch Empire	Fante Confederacy Akwapim tribes Akim tribes	Tantamkweri ceded to Akwapim tribes
Action of 3 February 1812 (1812)	United Kingdom	Haiti	Victory
War of 1812 (1812–1815)	United Kingdom British North America Tecumseh's Confederacy	United States	Stalemate Treaty of Ghent: Status quo ante bellum with no boundary changes American invasions of British Canada repulsed British invasions of the United States repulsed American occupation of Pensacola in Spanish Florida Defeat of Tecumseh's Confederacy
War of the Sixth Coalition (1812–1814)	Original Coalition Russian Empire Prussia Austrian Empire United Kingdom Sweden Spain Portugal Two Sicilies Kingdom of Sardinia After Battle of Leipzig Saxony Bavaria Württemberg Netherlands Sovereign Principality of the United Netherlands	First French Empire Napoleonic Italy Kingdom of Naples Duchy of Warsaw Until January 1814 Denmark–Norway Confederation of the Rhine (Many member states defected after Battle of Leipzig)	Victory Coalition victory, Treaty of Fontainebleau, First Treaty of Paris Bourbon Restoration; Napoleon's exile to Elba Various territorial changes Beginning of the Congress of Vienna Hostilities resume with the return of Napoleon to power in 1815
Second Kandyan War (1815)		Kandy	Victory Kandyan Convention: Dissolution of the Kandy royal line British King declared King of Kandy
Hundred Days (1815) War of the Seventh Coalition	Prussia France Hanover German Confederation Austria Russia Sweden Netherlands Spain Portugal Sardinia Kingdom of the Two Sicilies Tuscany	French Empire Naples	Victory Treaty of Paris: General French defeat Restoration of the House of Bourbon Abolition of the slave trade (all signatories) ₣100,000,000 compensation from France
Third Anglo-Maratha War (1817–1818)	East India Company	Maratha Empire	Victory Virtually all territory south of the Sutlej River controlled by Britain
5th Xhosa War (1818–1819)	Khoikhoi Forces	Forces of Xhosa Chief Maqana Nxele	Victory Xhosa pushed beyond Keiskama River
Greek War of Independence (1820–1830)	Greek revolutionaries Ionian Islands	Ottoman Empire Egypt	Victory Establishment of the Kingdom of Greece
First Ashanti War (1823–1831)		Ashanti Empire	Stalemate with a truce
First Anglo-Burmese War (1824–1826)	East India Company Native tribes	Kingdom of Burma	Victory Treaty of Yandabo: Assam, Manipur, Rakhine, and Taninthayi coast south of Salween river ceded from Burmah £1,000,000 compensation from Burma
Revolt of the Mercenaries (1828)	Brazil United Kingdom France	German Mercenaries Irish Mercenaries	Victory Mutiny suppressed
Portuguese Civil War (1828–1834)	Liberal Forces of Queen Maria II Spain	Absolutist Forces of King Miguel	Victory Concession of Evoramonte: Defeat and exile of King Miguel
Baptist War (1831–1832)	United Kingdom Jamaican Government	Rebel Slaves	Victory Slave defeat Rebellion suppressed
First Carlist War (1833–1840)	Forces of Queen Isabella II French Kingdom Forces of Queen Maria II	Carlists: Forces of Infante Carlos Forces of King Miguel	Victory British mediated Convention of Vergara
The 6th Xhosa War (1834–1836)	Free Khoikhoi	Xhosa tribes	Victory Extensive territorial gains from Xhosa
Rebellions of 1837 (1837–1838)	United Kingdom Province of Upper Canada Province of Lower Canada British Loyalists Supported by: United States	Patriotes Hunters' Lodges Reform Movement	Victory Patriote rebellion crushed by loyalist forces; Republic of Canada dismantled Defeat of Hunters' Lodges Unification of Upper and Lower Canada into the Province of Canada
First Anglo-Afghan War (1839–1842)	East India Company	Emirate of Afghanistan	British retreat from Afghanistan
First Opium War (1839–1842)		Manchu-China	Victory Treaty of Nanking: Five Chinese ports open to foreign trade $21,000,000 compensation from the Qing Empire Hong Kong Island ceded from the Qing Empire
Second Egyptian-Ottoman War (1839–1841)	Ottoman Empire British Empire	Egypt Eyalet Kingdom of the French Spain	Victory Egypt renounced its claim to Syria.
Uruguayan Civil War (1839–1851)	Colorados Argentine Unitarians French Kingdom Riograndense Republic Brazil Italian Legion	Blancos Argentine Confederation	British and French withdrawal before war's conclusion Peace treaty with the Argentine Confederation Eventual Colorados victory
First Anglo-Sikh War (1845–1846)	East India Company Patiala State	Sikh Empire	Victory Treaty of Lahore: Extensive territory ceded from the Sikh Empire Partial control over Sikh foreign affairs
Flagstaff War (1845–1846)	Forces of Tāmati Wāka Nene	Ngāpuhi Iwi	Stalemate
Hutt Valley Campaign (1846)	Te Āti Awa Iwi	Ngāti Toa Iwi	Victory Ngāti Toa Iwi retreat
The 7th Xhosa War (1846–1847) The War of the Axe		Xhosa tribes	Victory Territory ceded from Xhosa
Wanganui Campaign (1847)	Māori Kupapa	Māori Iwis	Stalemate 12 year peace and trade
Second Anglo-Sikh War (1848–1849)	East India Company	Sikh Empire	Victory Complete annexation of the Punjab by the East India Company
The 8th Xhosa War (1850–1853) Mlanjeni's War		Xhosa tribes Khoikhoi tribes Native Kafir Police	Victory Xhosa-Khoi attacks defeated Status quo ante bellum
Taiping Rebellion (1850–1864)	Qing dynasty France United Kingdom	Taiping Heavenly Kingdom	Victory Qing Dynasty victory Fall of the Taiping Heavenly Kingdom Weakening of the Qing dynasty
Second Anglo-Burmese War (1852–1853)		Kingdom of Burma	Victory Burmese revolution ended fighting Lower Burma annexed
Crimean War (1853–1856)	French Empire Ottoman Empire Kingdom of Sardinia	Russian Empire Bulgarian Legion	Victory Treaty of Paris
The National War in Nicaragua (1856–1857)	Costa Rica Honduras Rebel Forces of Patricio Rivas The Mosquito Coast Guatemala El Salvador United States	Sonora Nicaragua	Victory Sonora/Nicaraguan government defeat. Slavery outlawed. William Walker's army is defeated and he is arrested by the U.S. Navy.
Second Opium War (1856–1860) Arrow War	French Empire United States	Manchu-China	Victory The Treaty of Tientsin: Kowloon ceded from the Qing Empire Peking opened to foreign trade 11 more Chinese ports opened to foreign trade Yangtze River opened to foreign warships 4,000,000 taels of silver compensation China banned from referring to subjects of the crown as barbarians
Anglo-Persian War (1856–1857)	Afghanistan East India Company	Persia Herat	Victory Persian withdrawal from Herat
Indian Mutiny (1857–1858)	East India Company Nepal Jammu and Kashmir Princely states: Jaipur Bikaner Marwar Rampur Kapurthala Nabha Bhopal Sirohi Udaipur Patiala Sirmur Alwar Bharathpur Bundi Jaora Bijawar Ajaigarh Rewa Kendujhar Hyderabad	Sepoys of the East India Company Mughal Empire Awadh Jhansi 7 Princely states	Victory Act for the Better Government of India: Company rule in India dissolved Indian Empire established Ban on Christian missionaries in India
First Taranaki War (1860–1861) Second Māori War		Māori Iwis Māori King Movement	Stalemate
Bombardment of Kagoshima (1863)	British Empire	Satsuma Domain	Victory Tactical stalemate and mitigated British victory
Second Ashanti War (1863–1864)		Ashanti Empire	Stalemate
Invasion of Waikato (1863–1866) Third Māori War	Māori Kupapa	Māori King Movement	Victory Māori King Movement defeated, confined to King Country
Bhutan War (1864–1865)	India	Bhutan	Victory Treaty of Sinchula: Bhutan cedes Assam Duars and Bengal Duars to India Bhutan cedes territory in Dewangiri to India
British Expedition to Abyssinia (1867–1868)	United Kingdom	Ethiopia	Victory
Klang War (1867–1874) Selangor Civil War	Forces of Raja Abdullah of Klang British Straits Settlements	Forces of Raja Mahadi	Victory
Titokowaru's War (1868–1869) Part of the New Zealand land wars	Māori Kupapa	Ngāti Ruanui Iwi	Victory Ngāti Ruanui Iwi withdrawal
1868 Expedition to Abyssinia (1868)	India	Abyssinia	Victory British hostages freed War of the Abyssinian Succession begins
Te Kooti's War Part of the New Zealand land wars (1868–1872)	Māori Kupapa	Māori Iwis	Victory End of New Zealand land wars Territory ceded by Māori Iwis
Red River Rebellion (1869–1869)	Dominion of Canada Métis Loyalists	Métis Forces of Louis Riel	Victory Defeat of rebellion Manitoba Act: Creation of the Province of Manitoba
Third Ashanti War (1873–1874)		Ashanti Empire	Victory Treaty of Fomena: 50,000 oz of gold compensation from Ashanti Empire Ashanti withdrawal from coastal areas Ashanti banned from practicing human sacrifice
The 9th Xhosa War (1877–1879)	Mfengu Tribe	Xhosa Gcaleka Tribe	Victory All Xhosa territory annexed to the Cape Colony
Second Anglo-Afghan War (1878–1880)	India	Afghanistan	Victory British control over Afghan foreign affairs
Anglo-Zulu War (1879)	Natal	Zulu Kingdom	Victory Zululand annexed to Natal
‘Urabi Revolt (1879–1882)	United Kingdom Khedivate of Egypt	Egyptian and Sudanese forces under Ahmed ‘Urabi	Victory ‘Urabi forces defeated and exiled
First Boer War (1880–1881)		South African Republic	Defeat Pretoria Convention: South African Republic granted self-government
Mahdist War (1884–1889)	Egypt Italy Belgium	Mahdist Sudan	Victory Sudan ruled by Britain and Egypt
Third Anglo-Burmese War (1885)		Kingdom of Burma	Victory Upper Burma annexed to British Raj
Sikkim Expedition (1888)	India	Tibet	Victory Tibet recognizes British suzerainty over Sikkim
Anglo-Zanzibar War (1896)		Zanzibar	Victory Pro-British Sultan installed
Boxer Rebellion (1899–1901)	Japan Russia France United States Germany Italy Austria-Hungary	Righteous Harmony Society Manchu-China	Victory Boxer Protocol: Anti-foreign societies banned in China
Second Boer War (1899–1902)		Orange Free State South African Republic Foreign volunteers	Victory Treaty of Vereeniging: All Boers to surrender arms and swear allegiance to the Crown Dutch language permitted in education Promise to grant Boer republics self-government £3,000,000 compensation "reconstruction aid" to Afrikaners
Anglo-Aro War (1901–1902)		Aro Confederacy	Victory Aro Confederacy destroyed
British expedition to Tibet (1903–1904)	India	Tibet	Victory Status quo ante bellum
World War I (1914–1918)	India Dominion of Canada Australia New Zealand South Africa Newfoundland Belgium France Greece Portugal Romania Russia Italy Japan United States Serbia Montenegro Other Allies	Austria-Hungary Germany German Empire Ottoman Empire Bulgaria	Victory Treaty of Versailles: German demobilisation Treaties of Saint-Germain-en-Laye and Trianon: Demise of Austria-Hungary Russia pulls out in 1917 Russian Civil War Creation of the Soviet Union Creation of League of Nations: Mesopotamia ceded from the Ottoman Empire Palestine and Jordan ceded from the Ottoman Empire Tanganyika ceded from Germany Part of Kamerun ceded from Germany Part of Togoland ceded from Germany German New Guinea ceded to Australia German Samoa ceded to New Zealand German South-West Africa ceded to South Africa
Estonian War of Independence (1918–1920)	Estonia United Kingdom Finland Denmark Latvia White movement Swedish volunteers	Soviet Russia Baltische Landeswehr	Victory Independence of Estonia Vidzeme gained by the Republic of Latvia
Latvian War of Independence (1918–1920)	Latvia Estonia White Movement Poland Lithuania United Kingdom	German Empire West Russian Volunteer Army Russian SFSR Latvian SSR	Victory Independence of Latvia
Allied intervention in the Russian Civil War (1918–1920)	British Empire France United States Japan Greece	Soviet Russia Far Eastern Republic	Defeat Allied withdrawal from Russia Bolshevik victory over White Army Soviet Union new Russian Power
Turkish War of Independence (1919–1923)	United Kingdom	Ottoman Empire Turkish Nationalists	British withdrawal before war's conclusion Treaty of Lausanne Turkish Nationalist victory End of the Ottoman Empire
Third Anglo-Afghan War (1919–1919)	India	Afghanistan	Partial victory, Full Afghan independence
Irish War of Independence (1919–1921)	Royal Irish Constabulary (RIC)	Irish Republic	Anglo-Irish Treaty: Dominion status for southern Ireland as the Irish Free State
Somaliland campaign (1920) (1920)	British Somaliland British East Africa	Dervish State	Victory Demise of the Dervish State
Great Iraqi Revolution of 1920 (1920)		Iraqi rebels	Victory Revolt suppressed, greater autonomy given to Iraq

United Kingdom of Great Britain and Northern Ireland (1922–present)

Conflict	Britain & Her Allies	Belligerent Opposing Britain	Outcome
Adwan Rebellion (1923)	United Kingdom Emir Abdullah's forces Hashemite allied tribesmen: Sheykh Minwar al-Hadid	Sultan al-Adwan's forces	Victory Sultan al-Adwan's defeat and exile
Ikhwan Revolt (1927–1930)	Kuwait Nejd and Hejaz RAF	Ikhwan	Victory Ikhwan attack on Kuwait repelled. The remnants of the Ikhwan incorporated into regular Saudi units. The Ikhwan leadership was either slain or imprisoned.
Great Arab Revolt in Palestine (1936–1939)	Jewish Settlement Police Jewish Supernumerary Police Haganah Special Night Squads FOSH Peulot Meyuhadot Irgun Peace Bands	Arab Higher Committee	Victory Revolt suppressed
Jewish insurgency in Mandatory Palestine (1938–1948)	United Kingdom	Haganah Palmach Irgun Lehi	British terminate Mandate and withdraw Israeli Declaration of Independence
S-Plan 16 January 1939 – March 1940	United Kingdom	Irish Republican Army	Victory IRA failure
World War II (1939–1945)	The Allies France Denmark Poland Belgium Netherlands Luxembourg Czechoslovakia Norway Greece Yugoslavia Soviet Union United Kingdom United States Canada Australia New Zealand India Nepal South Africa Brazil China	Axis Powers Germany Italy Hungary Japan Bulgaria Croatia Romania Manchukuo Mengjiang Finland Thailand Vichy France	Victory Nazi Germany formally surrenders 8 May 1945, ending World War II in Europe. On August 15, 1945, following the dropping of atom bombs on Hiroshima and Nagasaki, Japan announces its surrender, ending World War II British (and Commonwealth), French, American, and Soviet troops occupy Germany until 1955, Italy and Japan lose their colonies, Europe is divided into 'Soviet' and 'Western' spheres of interest.
Northern Campaign 2 September 1942 – December 1944	Royal Ulster Constabulary	Irish Republican Army	Victory IRA campaign failure
Greek Civil War (1944–1948)	Kingdom of Greece United Kingdom United States	D.S.E. (Δ.Σ.Ε.) Albania Yugoslavia Bulgaria	Victory Communist forces defeated, many D.S.E. soldiers exiled in Eastern Europe. Battalion of UK troops still in Greece till 1948
Indonesian National Revolution (1945–1949)	United Kingdom Netherlands Empire of Japan (Until 1945)	Indonesia	Hand over to Dutch in 1946 Netherlands recognises Indonesian Independence
Operation Masterdom (1945–1946)	United Kingdom India France Empire of Japan	Viet Minh	Hand over to French First Indochina War begins
Corfu Channel incident (1946–1948)	United Kingdom	People's Socialist Republic of Albania	Victory ICJ awards compensation to Britain, which is not settled till 1992. Britain breaks off talks aimed at establishing diplomatic relations with Albania.
Malayan Emergency (1948–1960)	British Commonwealth United Kingdom Federation of Malaya Australia New Zealand Southern Rhodesia Fiji Kenya	Malayan Communist Party Malayan Races Liberation Army	Victory Communist retreat from Malaya Malayan independence
Korean War (1950–1953)	United Nations Command South Korea United States Commonwealth of Nations (British Commonwealth Forces Korea)	North Korea People's Republic of China Soviet Union	Ceasefire Communist invasion of South Korea repelled UN invasion of North Korea repelled
1951 Anglo-Egyptian War (1951–1952)	United Kingdom	Egypt	Victory Ended with the Egyptian Revolution of 1952.
Mau Mau Uprising (1952–1960)	United Kingdom British Kenya	Mau Mau	Victory Defeat of Mau Mau Kenyan independence
Jebel Akhdar War (1954–1959)	Sultanate of Muscat and Oman United Kingdom	Imamate of Oman Ibadi sect Saudi Arabia	Victory Dissolution of the Imamate of Oman
Cyprus Emergency (1955–1959)	United Kingdom Cyprus Colony	File:EOKA.jpg EOKA TMT	Cyprus became an independent republic in 1960 with Britain retaining control of two Sovereign Base Areas, at Akrotiri and Dhekelia. Enosis not achieved
Suez Crisis (1956–1957)	United Kingdom France Israel	Egypt	Coalition military victory Egyptian political victory Anglo-French withdrawal following international pressure (December 1956) Israeli occupation of Sinai (until March 1957) UNEF deployment in Sinai Straits of Tiran re-opened to Israeli shipping
Border Campaign (1956–1962)	United Kingdom	Irish Republican Army	Victory IRA campaign fails
First Cod War (1958–1961)	United Kingdom	Iceland	Defeat Iceland expands its territorial waters to 12 nautical miles
Indonesia–Malaysia confrontation (1962–1966)	Commonwealth of Nations Malaysia United Kingdom Australia New Zealand	Indonesia	Victory Indonesia recognises Malaysian rule over former North Borneo
Dhofar Rebellion (1962–1975)	Oman United Kingdom Iran Jordan	Various insurgents	Victory Insurgency defeated Modernisation of Oman
Aden Emergency (1963–1967)	Federation of South Arabia United Kingdom	NLF FLOSY	Defeat People's Republic of South Yemen established
Nigerian Civil War (1967–1970)	Nigeria Egypt United Kingdom	Biafra	Victory Biafra rejoins Nigeria
The Troubles (1968–1998)	United Kingdom	Provisional Irish Republican Army Official Irish Republican Army Irish National Liberation Army Irish People's Liberation Organisation Continuity Irish Republican Army Real Irish Republican Army Loyalist paramilitaries: Ulster Volunteer Force Ulster Defence Association Red Hand Commando Ulster Resistance Loyalist Volunteer Force	Stalemate Good Friday Agreement: Devolution in Northern Ireland Power-sharing deal Disarming of paramilitary groups Demilitarisation
Second Cod War (1972-1973)	United Kingdom	Iceland	Defeat UK accept Iceland's 50 nautical mile exclusive fishery zone
Third Cod War (1975-1976)	United Kingdom	Iceland	Defeat Iceland expands its exclusive fishery zone to 200 nautical miles
Falklands War (1982)	United Kingdom	Argentina	Victory The Falklands are retaken from Argentina
Multinational Force in Lebanon (1982–1984)	United Kingdom France United States Italy	Islamic Jihad Organization	Multinational Force withdrawal Lebanese Civil War continued until 1990 Britain provides smaller contribution than other 3 powers from Feb 1983, while the 3 others had intervened in Aug 1982, Britain, US, and Italy left in Feb 1984, with the French leaving by March 31, 1984.
Gulf War (1991)	Kuwait United States United Kingdom Saudi Arabia France Egypt Syria Other Allies	Iraq	Victory Kuwait regains its independence
Bosnian War (1992–1996)	UNPROFOR, NATO	Republika Srpska	Victory Dayton Accords
Operation Desert Fox (1998)	United States United Kingdom	Iraq	Victory Objectives largely achieved
Kosovo War (1998–1999)	United States United Kingdom France Canada Denmark Germany Italy Kosovo Liberation Army	Yugoslavia	Victory Kosovo occupied by Nato forces Kosovo administered by UNMIK
Sierra Leone Civil War (2000–2002)	Sierra Leone United Kingdom	Rebels Liberia	Victory Rebels defeated
War in Afghanistan Fourth Anglo-Afghan War (2001–2014)	Afghanistan United States United Kingdom Canada Germany Italy France Denmark Poland Romania Turkey Australia Spain ISAF	Islamic Emirate of Afghanistan	Victory Fall of Taliban régime and the Islamic Emirate of Afghanistan Osama bin Laden killed Taliban insurgency
Iraq War (2003–2009)	United States United Kingdom Iraq after the fall of Saddam Hussein Australia Poland Denmark Iraqi Kurdistan	Iraq under Saddam Hussein Various insurgents	Victory Fall of Ba'athist rule in Iraq Occupation of southern Iraq British withdrawal in 2009, conflict ended in 2011
Libyan Civil War (2011)	Many NATO members acting under UN mandate, including: United States United Kingdom France Denmark Italy Canada and Anti-Gaddafi forces several Arab League states Sweden	Pro-Gaddafi forces	Victory Fall of Gaddafi regime Muammar Gaddafi killed National Transitional Council take control
Military intervention against ISIL (2014–present)	United States United Kingdom Iraq Syrian Opposition Australia Belgium Canada Denmark France Germany Italy Netherlands New Zealand Norway Portugal Spain Turkey Bahrain Jordan Morocco Qatar Saudi Arabia United Arab Emirates Egypt Libya Nigeria Cameroon Chad Niger Russia	Islamic State of Iraq and the Levant Boko Haram al-Nusra Front Khorasan Ahrar ash-Sham	Ongoing The UK's Operation Shader is ongoing as part of intervention in Iraq (2014–present) On 17 September 2015, it was reported that around 330 ISIL fighters had been killed by British airstrikes, with zero civilian casualties By 26 September 2015, ISIL had lost a quarter of its territory, although it controls around half of Syria, and part of Iraq Multinational humanitarian effort intervention in Syria Spillover of the Syrian Civil War On Wednesday 2 December 2015, the House of Commons voted to authorise airstrikes against ISIL in Syria

See also

• List of wars involving England
• List of wars in Great Britain
• Military history of the United Kingdom
• Declaration of war by the United Kingdom
• Undeclared war