List of wars involving the United States

See also: Timeline of United States military operations

This is a list of wars and conflicts involving the United States of America during and since the American Revolutionary War, detailing all constituent military theatres and campaigns.

1950-present

Conflict	Combatant 1	Combatant 2	Result
Puerto Rican revolts (1950)	United States	PRNP	Victory Continued U.S. rule over Puerto Rico.
Korean War (1950–1953) Part of the Cold War	South Korea United States United Kingdom Canada Turkey Australia Ethiopia Philippines New Zealand Thailand Greece France Colombia Belgium South Africa Netherlands Luxembourg	North Korea China Soviet Union	Ceasefire Cease-fire armistice; North Korean invasion of South Korea repelled, UN invasion of North Korea repelled, Chinese invasion of South Korea repelled. Korean Demilitarized Zone established, little territorial change at the 38th parallel border.
First Indochina War (1950–1954) Part of the Cold War	France State of Vietnam Cambodia Kingdom of Laos United Kingdom British Raj United States	Viet Minh Pathet Lao Khmer Issarak UIF	Defeat Geneva Conference; French Indochina partitioned into four countries. Departure of the French from Indochina. Partition of Vietnam.
Air battle over Merklín (1953) Part of the Cold War	United States	Czechoslovakia	Tactical defeat U.S. F-84 shot down.
Vietnam War (1953–1975) Part of the Cold War and the Second Indochina War	South Vietnam United States South Korea Thailand Australia New Zealand Kingdom of Laos Khmer Republic	North Vietnam Viet Cong Khmer Rouge Khmer Issarak Pathet Lao North Korea	Defeat Withdrawal of American forces from Indochina. Dissolution of the Republic of Vietnam. Communist government takes power in South Vietnam.
Laotian Civil War (1953–1975) Part of the Cold War and the Second Indochina War	Kingdom of Laos United States South Vietnam Thailand	Pathet Lao North Vietnam	Defeat Withdrawal of American forces from Indochina. Communist government takes power in Laos.
Lebanon crisis (1958)	Lebanon United States	INM LCP PSP	Indecisive Lebanese President resigns Sectarian and political tensions intensify.
Congo Crisis (1960–1965) Part of the Cold War	United States Congo	Stanleyville Congo Simba Maoists Katanga South Kasai Belgium	Victory Joseph Mobutu seizes power.
Bay of Pigs Invasion (1961) Part of the Cold War	United States Brigade 2506	Cuba	Defeat U.S. invasion repelled.
Colombian conflict (1964–present)	Colombia United States	FARC ELN EPL	Ongoing Ongoing conflict.
Invasion of the Dominican Republic (1965–1966) Part of the Cold War	United States Brazil Honduras Paraguay Nicaragua Costa Rica El Salvador	Dominican R PRD	Victory Occupation of the Dominican Republic Juan Bosch excluded from Presidency, election of Joaquín Balaguer.
Korean DMZ Conflict (1966–1969) Part of the Cold War	South Korea United States	North Korea	Status quo ante bellum Continued division of Korea Lower tensions until 2013 Korean crisis.
Cambodian Civil War (1970–1975) Part of the Cold War and the Second Indochina War	Cambodia Khmer Republic United States South Vietnam	FUNK North Vietnam Viet Cong	Defeat Withdrawal of American forces from Indochina Communist government takes power in Cambodia Cambodian Genocide.
Soviet war in Afghanistan (1979–1989) Part of the Cold War and the Conflict in Afghanistan	Peshawar Seven Pakistan United States Tehran Eight Iran	Soviet Union DR Afghanistan	Victory Soviet forces withdraw from Afghanistan Civil war continues Communist government falls in 1992
First Gulf of Sidra incident (1981)	United States	Libya	Indecisive Deterioration of Libya–United States relations.
Lebanese Civil War (1982–1984)	Lebanon United States France Italy United Kingdom Syria Sudan Saudi Arabia Libya UAE	LF SLA Israel Tigers Militia Marada Brigades LNM LNRF PLO Amal Movement Hezbollah IUM	Taif Agreement Christian 6:5 ascendancy replaced by 1:1 representation Muslim prime-ministerial powers strengthened PLO expulsion from Lebanon Syrian occupation of most of Lebanon Israeli occupation of South Lebanon
Invasion of Grenada (1983) Part of the Cold War	United States Antigua Barbados Dominica Jamaica Saint Lucia	Grenada Cuba North Korea	Victory UN condemnation Occupation of Grenada.
Action in the Gulf of Sidra (1986)	United States	Libya	Tactical victory Deterioration of Libya–United States relations.
Bombing of Libya (1986)	United States	Libya	Indecisive Deterioration of Libya–United States relations.
Operation Earnest Will (1987–1988)	United States	Iran	Ceasefire United Nations Security Council Resolution 598 UN enforced status quo ante bellum.
Second Gulf of Sidra incident (1989)	United States	Libya	Tactical victory Deterioration of Libya–United States relations.
Invasion of Panama (1989–1990)	United States	Panama	Victory UN condemnation.
Gulf War (1990–1991)	Kuwait United States United Kingdom Saudi Arabia France	Iraq	Victory Iraqi withdrawal from Kuwait; Emir Jaber III restored Sanctions against Iraq.
Iraqi no-fly zones conflict (1991–2003) Part of the Iraqi–Kurdish conflict	United States United Kingdom France Australia Belgium	Iraq Jordan	Victory No fly zones enforced through airpower.
Operation Restore Hope (1992–1994) Part of the Somali Civil War	United States	USC	Victory UN humanitarian mandate fulfilled.
Bosnian War (1993–1995) Part of the Yugoslav Wars	Bosnia Herzeg-Bosnia Croatia United States	Republika Srpska YPA Serbian Krajina Western Bosnia FR Yugoslavia	Dayton Accords Internal partition of Bosnia and Herzegovina according to the Dayton Accords Massive civilian casualties for the Bosniak ethnic group.
Operation Uphold Democracy (1994–1995)	United States Poland Argentina	Haiti	Victory Reinstatement of Jean-Bertrand Aristide as President of Haiti.
Operation Infinite Reach (1998)	United States	al-Qaeda HUM NIF	Indecisive Osama bin Laden pledges to attack the U.S. again.
Kosovo War (1999) Part of the Yugoslav Wars	KLA AFRK United States	FR Yugoslavia	Kumanovo Treaty Both sides declare victory KLA veterans join the UÇPMB, starting the Preševo insurgency.
War in Afghanistan (2001–present) Part of the War on Terror and the Conflict in Afghanistan	United States Afghanistan United Kingdom Germany Italy Georgia Poland Romania Turkey Australia Iran Northern Alliance	Taliban al-Qaeda IMU HI-Gulbuddin HI-Khalis Haqqani network Lashkar-e-Taiba JeM ETIM TTP IEW TNSM IJU	Ongoing Invasion of Afghanistan Fall of the Taliban government Destruction of al-Qaeda camps Over two thirds of al-Qaeda's leadership demolished Occupation of Afghanistan Establishment of a new Afghan Government and Security Force Taliban insurgency War in North-West Pakistan Killing of Osama bin Laden.
Operation Enduring Freedom – Philippines (2002–present) Part of the War on Terror and the Moro insurgency in the Philippines	Philippines United States Australia	Moro Islamic Front Abu Sayyaf Jemaah Islamiyah	Ongoing Ongoing conflict.
Operation Enduring Freedom – Horn of Africa (2002–present) Part of the War on Terror and the Somali Civil War	United States Djibouti Somalia Ethiopia Sudan Seychelles Kenya	AIAI ICU al-Shabaab Hizbul Islam al-Qaeda	Ongoing Ongoing conflict.
Second Liberian Civil War (2003)	LURD MODEL Sierra Leone Guinea United Kingdom United States	Liberia	Victory Charles Taylor exiled to Nigeria Transitional Government of Liberia installed Accra Comprehensive Peace Agreement signed United Nations Mission in Liberia deployed.
Iraq War (2003–2011) Part of the War on Terror	United States Iraq United Kingdom South Korea Italy Poland Australia Georgia Ukraine	Baath loyalists ISIS al-Qaeda in Iraq Mahdi Army Special Groups IAI Ansar al-Sunnah Iraq	Defeat Invasion of Iraq Overthrow of Baath Party government and execution of Saddam Hussein Coalition occupation of Iraq Iraqi insurgency and sectarian violence Elections held American withdrawal in 2011 Ongoing insurgency.
War in North-West Pakistan (2004–present) Part of the War on Terror	Pakistan United States	Taliban TTP TNSM al-Qaeda Lashkar-e-Islam IMU Ghazi Force	Ongoing Ongoing insurgency Large part of FATA under Taliban control Shifting public support for the Pakistani government.
War in Somalia (2006–2009) Part of the War on Terror and the Somali Civil War	Ethiopia TFG Puntland Galmudug Sufi groups United States Uganda Burundi Nigeria Ghana Malawi	ICU OLF ARS al-Shabaab RKB Jabhatul Islamiya Muaskar Anole al-Qaeda	Defeat Islamists re-take Mogadishu & much of southern and central Somalia, including the TFG headquarters at Baidoa, which was seized by al-Shabaab Ethiopian troops withdraw from the country Moderate Islamist leader and ARS-chairman Sharif Ahmed becomes new Somali president Enforcement of Sharia Law by Sharif Ahmed administration.
Operation Enduring Freedom – Trans Sahara (2007–present) Part of the War on Terror and the Insurgency in the Maghreb	United States Algeria Morocco Mauritania Tunisia Burkina Faso	AQIM Ansar Dine	Ongoing Ongoing conflict.
Al-Qaeda insurgency in Yemen (2010–present) Part of the War on Terror	Yemen United States	Ansar al-Sharia	Ongoing al-Qaeda holds partial control in Yemen.
Libyan civil war (2011) Part of the Arab Spring	NLA Qatar United States al-Qaeda	Libya	Victory Overthrow of Gaddafi government Ongoing inter-factional fighting.
LRA insurgency (2011–present)	Uganda South Sudan DR Congo United States	LRA	Ongoing Ongoing conflict.

Older conflicts

Dates indicate the years in which the United States of America was involved in the war.

War or conflict's name(s)	Campaign or Theater	Opponent(s)	Time	Conclusion(s)
American Revolutionary War or American War of Independence		Kingdom of Great Britain Loyalists Iroquois Cherokee	September 1, 1774 – September 3, 1783	American victory Treaty of Paris Britain recognizes the independence of the United States of America
	Western theater of the American Revolutionary War part of the American Revolutionary War	American Indians Kingdom of Great Britain	1775 – 1778	Military stalemate, United States diplomatic victory; Spanish Louisiana successfully defended
	Southern Theater Part of the American Revolutionary War	Kingdom of Great Britain	1775 – 1782	Decisive Franco/American victory Surrender of British army at Yorktown
	Invasion of Canada (1775) or Canadian Campaign part of the American Revolutionary War	Kingdom of Great Britain Canadian militia	June 1775 – October 1776	American defeat, Defeat of Colonial invasion; British counter-offensive
	Chickamauga Wars (1776–1794) Part of the American Revolutionary War	American Indians Kingdom of Great Britain Cherokee Shawnee Seminole Ojibway Creek Chickamauga Meskwaki Miami Mingo Kickapoo Lenape Mascouten Potawatomi Sauk Wyandot	1776 – 1794	Decisive American victory: United States diplomatic victory, American rights in Treaty of Paris successfully defended Britain recognizes independence of the United States and cedes forts and influence in Indian territory.
	New York and New Jersey Campaign Part of the American Revolutionary War	Kingdom of Great Britain Hesse-Kassel Waldeck-Pyrmont	July 1776 – March 1777	New York: British gain control of New York City, British victory New Jersey: Americans lose and then regain control of New Jersey, American victory
	Philadelphia Campaign part of the American Revolutionary War	Kingdom of Great Britain Hesse-Kassel Ansbach-Bayreuth	1777 – 1778	British occupation then evacuation of Philadelphia
	Saratoga Campaign part of the American Revolutionary War	Kingdom of Great Britain Brunswick-luneburg Hesse-Hanau Iroquois Confederation (except tribes)	June 14, 1777 – October 17, 1777	Decisive American victory: Surrender of British army Entry of France into the war
	Northern Theater Part of the American Revolutionary War	Kingdom of Great Britain	1778 – 1782	???[Clarification needed]
	Gulf Coast campaign Part of the American Revolutionary War	Kingdom of Great Britain Choctaw Creek	1779 – 1782	Decisive Spanish/American victory
	Yorktown Campaign Part of the American Revolutionary War	Kingdom of Great Britain Ansbach-Bayreuth Hesse-Kassel	January – October, 1781	Decisive Franco/American victory
Northwest Indian War or Little Turtle's War or Miami Campaign		Western Confederacy Canadian Militia	1785 – 1795	American victory, Treaty of Greenville
Quasi-War or Franco-American War or Half War		French Republic	1798 – 1800	Indecisive American victory: End of French privateer attacks on American shipping America neutrality and renunciation of claims against France
First Barbary War or Barbary Coast War or Tripolitan War		Vilayet of Tripoli Morocco	1801 – 1805	American victory, peace treaty
Tecumseh's War or Tecumseh's Rebellion		Tecumseh's Confederacy	August – November 1811	American victory, peace treaty
War of 1812 or Second War of Independence		British Empire Shawnee Red Sticks Ojibway Chickamauga Meskwaki Iroquois Miami Mingo Odawa Kickapoo Lenape Mascouten Potawatomi Sauk Wyandot	June 18, 1812 – March 23, 1815	Treaty of Ghent Status quo ante bellum
	Atlantic Theater Part of the War of 1812	British Empire	1812 – 1815	British blockade of America: Treaty of Ghent Status quo ante bellum
	Chesapeake Campaign Part of the Atlantic Theater of the War of 1812	British Empire	1813 – 1814	Inconclusive: Treaty of Ghent Status quo ante bellum
	Great Lakes and Western Theater Part of the War of 1812	British Empire	1812 – 1815	American control of Lake Erie, British control of remaining four lake: Treaty of Ghent Status quo ante bellum
	Canadian Campaign Part of the Great Lakes and Western Theater of the War of 1812	British Empire	1812 – 1813	Indecisive: Treaty of Ghent Status quo ante bellum
	American Northwest Campaign Part of the Great Lakes and Western Theater of the War of 1812	British Empire	1813	Inconclusive: Treaty of Ghent Status quo ante bellum
	American West Campaign Part of the Great Lakes and Western Theater of the War of 1812	British Empire	1813 – 1814	Inconclusive, British maintain control of Fort Mackinac: Treaty of Ghent Status quo ante bellum
	Niagara Frontier Campaign Part of the Great Lakes and Western Theater of the War of 1812	British Empire		American invasion force defeated: Treaty of Ghent Status quo ante bellum
	St. Lawrence and Lower Canada Campaign Part of the Great Lakes and Western Theater of the War of 1812	British Empire
	Niagara and Plattsburgh Campaigns Part of the Great Lakes and Western Theater of the War of 1812	British Empire	1814	Inconclusive, Americans regain control of Lake Champlain: Treaty of Ghent Status quo ante bellum
	Southern Theater Part of the War of 1812	British Empire	1814 – 1815	Decisive American victory: Treaty of Ghent Status quo ante bellum
	Creek War Part of the Southern Theater of the War of 1812	Red Stick Creek	1813 – 1814	American/Allied Native American victory
Second Barbary War or Algerian War		Algiers	1815	American victory
West Indies Anti-Piracy Operations		Caribbean Pirates	1817 – 1825	American victory
First Seminole War		Seminole Spanish Florida	November 22, 1817 – April 12, 1818	American victory
African Anti-Slavery Operations		African Slave Traders	1819 – 1861	Atlantic slave trade suppressed by 1861
Callao Affair		Spain	November 5 – 6, 1820	Spanish vow to punish those responsible for attacks on American shipping.
Arikara War		Arikara	1823	The Arikara eventually settled with the Mandan and Hidatsa on the Fort Berthold Reservation in North Dakota
Aegean Anti-Piracy Operations		Greek Pirates	1825 – 1828	United States victory
Winnebago War or Le Fèvre Indian War		Prairie La Crosse Ho-Chunks, with a few allies	1827	United States victory; Ho-Chunks cede lead mining region to the United States
First Sumatran Expedition		Chiefdom of Kuala Batee	February 6 – February 9, 1832	United States victory
Black Hawk War or Black Hawk Campaign		Black Hawk's British Band, with Ho-Chunk and Potawatomi allies	May–August 1832	United States victory
Second Seminole War or Florida War		Seminole	December 23, 1835 – August 14, 1842	3,800 Seminoles transported to the Indian Territory, 300 remain in Everglades
United States Exploring Expedition		Fiji Samoa Tabiteuea	1838 – 1842	Successful expedition, victory in battle with aboriginals
Second Sumatran Expedition		Chiefdom of Quallah Battoo	December 1838 – January 1839	United States victory, Malays agree to cease attacks on American vessels
Capture of Monterey		Mexico	October 19–20, 1842	United States captures Monterey
Battle of Kororareka		Māori	March 11, 1845	Māori victory
Mexican–American War or Mexican War		Mexico	April 25, 1846 – February 2, 1848	Decisive United States victory: Republic of Texas unites with the United States End of all conflict between Texas and Mexico All claims by Texas recognized by Mexico Treaty of Guadalupe Hidalgo Mexican Cession
	Texas Campaign Part of the Mexican-American War	Mexico	1846	Decisive US victory: All Mexican forces pushed out of State of Texas, Mexican bandits suppressed
	Conquest of California Part of the Mexican-American War	Mexico	1846 – 1847	Decisive US victory: Declaration of Independence of California and establishment of the Republic of California United States annexed the Republic of California All Mexican forces defeated or surrender to US Indian tribal nations recognize US suzerainty Treaty of Guadalupe Hidalgo
	New Mexico and Arizona Campaign Part of the Mexican-American War	Mexico	1846 – 1847	Decisive US victory: All Mexican forces pushed out of region Territory annexed to the US Indian tribal nations recognize US suzerainty Treaty of Guadalupe Hidalgo
	Pacific Coast Campaign Part of the Mexican-American War	Mexico	1847 – 1848	Decisive US victory Indian tribal nations recognize US suzerainty
	Mexico City Campaign Part of the Mexican-American War	Mexico	1847	Decisive US victory Mexican Cession Treaty of Guadalupe Hidalgo
Cayuse War		Cayuse	1847 – 1855	United States victory
Pitt River Expedition		Tolowa Nomlaki Chimariko Wintun	April 28 – September 13, 1850	???[Clarification needed]
Apache Wars		Apache Ute Yavapai	1851 – 1900	Decisive American victory, Apaches moved to reservations
Bombardment of San Juan del Norte or Bombardment of Greytown		Nicaragua	July 13, 1854	United States victory, town severely damaged
Puget Sound War		Nisqually Muckleshoot Puyallup Klickitat Haida Tlingit	1855 – 1856	Indians relocated to Siletz, Grand Ronde, and Coast Reservations
Rogue River Wars		Rogue River people	1855 – 1856	Indians relocated to Siletz, Grand Ronde, and Coast Reservations
Third Seminole War or Billy Bowlegs War		Seminole	1855 – 1858	United States victory
Yakima War		Yakama	1855 – 1858	American victory, peace treaty
Battle of Ty-ho Bay		Chinese Pirates	August 4, 1855	Anglo-American victory
First Fiji Expedition		Fiji	October 1855	United States victory in battle, objective failed
Second Opium War or Second Anglo-Chinese War or Second China War		Qing Dynasty	1856 – 1859	Treaty of Tianjin June 18, 1858
Navajo Wars		Navajo	1858 – 1866	United States victory, Long Walk of the Navajo
Utah War		United States Utah Mormons Nauvoo Legion	1857 – 1858	Brigham Young replaced as governor of the territory. Territory accepts U.S Federal authority.
Second Fiji Expedition		Fiji	6–16 October 1858	United States victory
Paraguay Expedition		Paraguay	1859	Paraguay extended an apology to the United States, indemnified the family of the slain Water Witch crewman, and granted the United States a new and highly advantageous commercial treaty
Paiute War or Paiute Indian War or Pyramid Lake War		Paiute Bannock Shoshone	1860	United States victory
Reform War		Conservatives	March 6, 1860	United States victory
American Civil War or War Between the States		Confederate States of America	April 12, 1861 – April 9, 1865	Union victory: Territorial integrity of the United States of America preserved Slavery abolished Seceded states of the Confederate States of America eventually re-admitted to the Union
	Eastern Theater Part of the American Civil War	Confederate States of America	1861 – 1865	Union victory
	Western Theater Part of the American Civil War	Confederate States of America	1861 – 1865	Union victory
	Lower Seaboard Theater Part of the American Civil War	Confederate States of America	1862 – 1865	Union victory
	Pacific Coast Theater Part of the American Civil War	Confederate States of America	1862 – 1865	Union victory
	Trans-Mississippi Theater Part of the American Civil War	Confederate States of America	1862 – 1865	Union victory
Bombardment of Qui Nhơn or Cochinchina Campaign		File:Early Nguyen Dynasty Flag.svg Nguyen Dynasty	July 31, 1861	United States victory, fort silenced
Dakota War of 1862 or Sioux Uprising or Sioux Outbreak of 1862		Dakota Sioux	August 17 – December 26, 1862	United States victory
Colorado War		Cheyenne Arapaho	1863 – 1865	United States victory
Battles for Shimonoseki		Chōshū Domain	July 20, 1863 – September 6, 1864	Decisive Allied victory
Snake War		Paiute Bannock Shoshone	1864 – 1868	United States victory
Powder River Expedition or Connor Expedition		Sioux Cheyenne Arapaho	1865	United States victory; raids along Bozeman trail stopped
Red Cloud's War or Bozeman War or Powder River War		Lakota Cheyenne Arapaho	1866 – 1868	Indian victory: Treaty of Fort Laramie (1868) Creation of the Great Sioux Reservation (including the Black Hills).
Comanche Campaign or Comanche War		Cheyenne Arapaho Comanche Kiowa	1867 – 1875	United States victory
Formosa Expedition or Taiwan Expedition of 1867		Paiwan	June 1867	United States objectives failed
Korean Expedition or Shinmiyangyo		Joseon Dynasty	June 1, 1871 – July 3, 1871	United States military victory, United States diplomatic failure; Korean-American Treaty of Amity and Commerce
Modoc War or Modoc Campaign or Lava Beds War		Modoc	July 6, 1872 – June 4, 1873	United States victory
Red River War		Cheyenne Arapaho Comanche Kiowa	June 27, 1874 – June 1875	United States victory; end to the Texas-Indian Wars
Black Hills War or Great Sioux War of 1876–77 or Little Big Horn Campaign		Lakota Northern Cheyenne Arapaho	1876 – 1877	United States victory
Nez Perce War or Nez Perce Campaign		Nez Perce	1877	United States victory
Bannock War or Bannock Campaign		Bannock Shoshone	1878	United States victory
Cheyenne War or Cheyenne Campaign		Cheyenne	1878 – 1879	United States victory
Sheepeater Indian War		Shoshone	1879	United States victory
White River War or Ute War or Ute Campaign		Ute	1879 – 1880	United States victory
Pine Ridge Campaign or Ghost Dance War		Sioux	November 1890 – January 1891	United States victory
Second Samoan Civil War		Mataafans	1898 – 1899	Mataafan victory, Mata'afa Iosefo becomes high chief of Samoa; United States acquires American Samoa, Germany acquires German Samoa
Spanish–American War		Spain	April 25 – August 12, 1898	United States victory: Decisive United States victory Treaty of Paris Spain relinquishes sovereignty over Cuba, cedes the Philippine Islands, Puerto Rico, and Guam to the United States for the sum of $20 million
	Caribbean Theater Part of the Spanish-American War	Spain	1898	US victory
	Cuban Campaign Part of the Caribbean Theatre of the Spanish-American War	Spain	1898	US victory
	Puerto Rican Campaign Part of the Caribbean Theatre of the Spanish-American War	Spain	1898	Militarily inconclusive, Spain cedes Puerto Rico in accordance with the accords of the Treaty of Paris of 1898
	Pacific Theater Part of the Spanish-American War	Spain	1898	US victory
	Guam Campaign Part of the Pacific Theatre of the Spanish-American War	Spain	1898	United States victory: United States captures Guam
	Philippine Campaign Part of the Pacific Theatre of the Spanish-American War	Spain	1898	Expulsion of the Spanish colonial government during Spanish–American War (1898)
Moro Rebellion		Sultanate of Sulu Moro	1899 – 1913	United States victory
Philippine–American War or Philippine War of Independence or Philippine Insurrection		First Philippine Republic Revolutionary forces Pulajanes	June 2, 1899 – July 4, 1902	United States victory and dissolution of the First Philippine Republic; The Philippine Islands becomes an unincorporated territory of the United States
Boxer Rebellion or The Boxer Uprising		Righteous Harmony Society Qing Empire	September 28, 1899 – August 15, 1900	Alliance victory
Occupation of Nicaragua or Nicaraguan Campaign		Liberal rebels	1912 – 1933	United States victory
Mexican Revolution or Mexican Expedition or Pancho Villa Expedition		Mexico Yaqui	April 21, 1914 – June 16, 1919	Porfirio Diaz ousted from power and exiled in France, Convention of Aguascalientes between revolutionary leaders, Mexican Constitution of 1917 enacted, assassination of important revolutionary leaders Madero, Zapata and Carranza, founding of the National Revolutionary Party
Occupation of Haiti or Haitian Campaign or Caco War		Haiti Caco rebels	July 28, 1915 – August 1, 1934	United States victory, Cacos defeated, Haiti occupied.
Occupation of the Dominican Republic or Dominican Campaign		Dominican Republic	1916 – 1924	United States victory, Dominican Republic occupied.
World War I or First World War or Great War		Germany Austria-Hungary	1917 – 1918	Armistice with Germany November 11, 1918 Paris Peace Conference 1919 Treaty of Berlin (August 25, 1921) Treaty of Trianon (in part) Allied victory: End of the German, Russian, Ottoman, and Austro-Hungarian empires Formation of new countries in Europe and the Middle East Transfer of German colonies and regions of the former Ottoman Empire to other powers Establishment of the League of Nations
	Asian and Pacific Theatre Part of World War I	Germany	1917 – 1918	Allied victory; Treaty of Versailles
	European Theatre Part of World War I	Germany Austria-Hungary	1917 – 1918	Allied victory; Treaty of Versailles, Treaty of Brest-Litovsk
	Italian Campaign Part of the European Theatre of World War I	Germany Austria-Hungary	1917 – 1918	Allied victory; Treaty of Versailles
	Western Front Part of the European Theatre of World War I	Germany Austria-Hungary	1917 – 1918	Allied victory; Collapse of the German Empire.
	First Battle of the Atlantic Part of World War I	Germany	1917 – 1918	Allied victory; Treaty of Versailles
Russian Civil War		Russia	1918 – 1920	Allied withdrawal from Russia
	North Russia Campaign Part of the Russian Civil War	Russia	1918 – 1920	Allied withdrawal
	Siberian Intervention Part of the Russian Civil War	Russia	1918 – 1920	Allied withdrawal
World War II or Second World War		Nazi Germany Empire of Japan Fascist Italy Italian Social Republic Hungary Romania Bulgaria Finland Thailand Croatia	December 7, 1941 – September 2, 1945	Allied victory: Dissolution of the Third Reich Dissolution of the Empire of Japan Creation of the United Nations Emergence of the United States and the Soviet Union as superpowers Beginning of the Cold War
	Pacific War Part of World War II	Empire of Japan Manchukuo Wang Jingwei regime Second Philippine Republic Thailand Free India	1941 – 1945	Decisive Allied victory End of World War II: Fall of the Empire of Japan. Continuation of Chinese Civil War. Substantial weakening of European colonial powers, gradual decolonization of Asia (including the Indonesian National Revolution and the First Indochina War) American occupation of Japan, removal of all Japanese troops occupying parts of the Republic of China, retrocession of Taiwan to China, liberation of Korea and Manchuria from Japanese rule, division of Korea, secession of all Japanese-held islands in the Central Pacific Ocean, such as the Marianas Islands, the Marshall Islands, the Caroline Islands, and the Palau Islands to the United Nations, removal of all Japanese troops from the Australian-governed Solomon Islands, Papua New Guinea, the Admiralty Islands, and the Bismarck Archipelago, seizure of Sakhalin and of the Kuril Islands by the Soviet Union
	Burma Campaign Part of the Pacific War of World War II	Empire of Japan State of Burma Thailand Free India	January 1942 – July 1945	Decisive Allied victory, leading to later Independence of Burma in 1948
	Solomon Islands Campaign Part of the Pacific War of World War II	Empire of Japan	January 1942 – August 21, 1945	Decisive Allied victory
	New Guinea Campaign Part of the Pacific War of World War II	Empire of Japan	January 23, 1942 – August 1945	Allied victory
	Aleutian Islands Campaign Part of the Pacific War of World War II	Empire of Japan	June 3, 1942 – August 15, 1943	Allied victory
	Guadalcanal Campaign Part of the Pacific War of World War II	Empire of Japan	August 7, 1942 – February 9, 1943	Strategic Allied victory
	Gilbert and Marshall Islands Campaign Part of the Pacific War of World War II	Empire of Japan	November, 1943 – February 1944	Allied victory
	Mariana and Palau Islands Campaign Part of the Pacific War of World War II	Empire of Japan	June – November 1944	American victory
	Philippines Campaign Part of the Pacific War of World War II	Empire of Japan Second Philippine Republic	October 20, 1944 – September 2, 1945	Allied victory; Allied forces liberate the Philippines
	Volcano and Ryukyu Islands Campaign Part of the Pacific War of World War II	Empire of Japan	January – June 1945	Allied victory
	Japan Campaign Part of the Pacific War of World War II	Empire of Japan	February 16 – July 23, 1945	Allied victory
	Borneo Campaign Part of the Pacific War of World War II	Empire of Japan	May 1 – August 1, 1945	Allied victory; the Japanese are pushed further from Australia
	Second Battle of the Atlantic Part of World War II	Nazi Germany Kingdom of Italy Vichy France	1941 – 1945	Decisive Allied victory
	Mediterranean, Middle East and African Theaters Part of World War II	Nazi Germany Kingdom of Italy Vichy France Italian Social Republic	1941 – 1945	Allied victory
	Egypt–Libya Campaign Part of the Mediterranean, Middle East and African Theaters of World War II	Germany	1942 – 1943	Allied forces finally succeed in driving all Axis forces out of Libya
	Algeria-French Morocco Campaign Part of the Mediterranean, Middle East and African Theaters of World War II	Vichy France Nazi Germany (naval participation in Morocco)	November 8–16, 1942	Allied victory
	Tunisia Campaign Part of the Mediterranean, Middle East and African Theaters of World War II	Germany Kingdom of Italy	November 17, 1942 – May 13, 1943	Decisive Allied victory
	Sicily Campaign Part of the Mediterranean, Middle East and African Theaters of World War II	Kingdom of Italy Nazi Germany	July 9 – August 17, 1943	Allied victory
	European Theater Part of World War II	Nazi Germany Kingdom of Italy Vichy France Italian Social Republic Hungary	1943 – 1945	Decisive Allied victory: Fall of Nazi Germany (concurrently with Eastern Front) Fall of Fascist Italy Liberation of occupied countries in Western and Northern Europe Partition of Germany (1945)
	Naples-Foggia Campaign Part of the European Theater of World War II	Germany Italy (to 8 September)	September 3, 1943 – September 16, 1943	Allied victory
	Anzio Campaign Part of the European Theater of World War II	Nazi Germany Italian Social Republic	January 22, 1944 – June 4, 1944	Operation successful; VI Corps established beachhead; Battle of Anzio followed
	Rome-Arno Campaign Part of the European Theater of World War II	Nazi Germany	January 22, 1944 – September 9, 1944	German resistance crumbled
	Normandy Campaign Part of the European Theater of World War II	Germany	June 6, 1944 – mid-July 1944	Decisive Allied victory
	Northern France Campaign Part of the European Theater of World War II	Germany	June 6 – August 15, 1944	Decisive Allied victory
	Southern France Campaign Part of the European Theater of World War II	Nazi Germany	August 15, 1944 – September 14, 1944	Allied victory
	North Apennines Campaign Part of the European Theater of World War II	Nazi Germany Italian Social Republic	August 25 – December 17, 1944	Inconclusive
	Rhineland Campaign Part of the European Theater of World War II	Germany	August 25, 1944 – March 1945	Allied victory
	Ardennes-Alsace Campaign Part of the European Theater of World War II	Germany	December 16, 1944 – January 18, 1945	Allied victory
	Central Europe Campaign Part of the European Theater of World War II	Germany Hungary	February 8, 1945 – May 8, 1945	Allied victory
	Po Valley Campaign Part of the European Theater of World War II	Nazi Germany Italian Social Republic	April 6, 1945 – May 2, 1945	Decisive Allied victory: German surrender in Italy Italian Social Republic disestablished

See also

• List of ongoing political conflicts

External links

• Heidelberg Institute for International Conflict Research (HIIK)
  • Conflict Barometer – Describes recent trends in conflict development, escalations, and settlements
• A Continent Divided: The U.S.-Mexico War, Center for Greater Southwestern Studies, the University of Texas at Arlington