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

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

See also Timeline of United States military operations.

18th Century

War or conflict	Opponent(s)	Initial authorization	Votes		UNSCR	President(s)	Conclusion(s)
			Senate	House
American Revolutionary War	United Kingdom  American Loyalists Anhalt-Zerbst Ansbach-Bayreuth  Hanover Hesse-Hanau  Hesse-Kassel Brunswick-Wolfenbüttel  Waldeck-Pyrmont Iroquois Cherokee	Declaration of the Causes and Necessity of Taking Up Arms July 6, 1775	-	-	-	President of the Continental Congress Hancock, Laurens, Jay, Huntington, McKean, Hanson	Treaty of Paris (1783)
Northwest Indian War	Western Confederacy				-	George Washington	Treaty of Greenville 1795
Quasi-War	France	Act Further to Protect the Commerce of the United States July 9, 1798			-	John Adams	Convention of 1800 (Treaty of Mortefontaine)

19th Century

War or conflict	Opponent(s)	Initial authorization	Votes		UNSCR	President(s)	Conclusion(s)
			Senate	House
First Barbary War	Barbary States Barbary Pirates	1801			-	Thomas Jefferson	"Treaty of Peace and Amity" 1805
War of 1812	United Kingdom British North America Shawnee Red Sticks Ojibway Chickamauga Meskwaki Iroquois Miami Mingo Odawa Kickapoo Lenape Mascouten Potawatomi Sauk Wyandot	June 18, 1812	19-13	79-49	-	James Madison	Treaty of Ghent December 24, 1814
Second Barbary War	Algiers Barbary Pirates	1815			-	James Madison	1816
First Seminole War	Seminole Spanish Florida	1817			-	James Monroe	1818
Winnebago War	Ho-Chunk	1827			-	John Quincy Adams	Treaty with the Winnebago August 1829
Black Hawk War	British Band	1832			-	Andrew Jackson	Black Hawk Purchase September 21, 1832
First Sumatran Expedition	Cheifdom of Quallah Battoo	1832	-	-	-	Andrew Jackson	February 9, 1832
Second Seminole War	Seminole	1835			-	Andrew Jackson Martin Van Buren	1842
Second Sumatran Expedition	Cheifdom of Quallah Battoo	1838	-	-	-	Martin Van Buren	1838
Mexican-American War	Mexico	May 13, 1846	40-2	173-14	-	James Polk	Treaty of Guadalupe Hidalgo February 2, 1848
Navajo Wars	Navajo	1846			-	John Tyler James Polk Zachary Taylor Millard Fillmore Franklin Pierce James Buchanan Abraham Lincoln	1863
Cayuse War	Cayuse	1847			-	John Tyler James Polk Zachary Taylor Millard Fillmore	1853
Apache Wars	Apache Ute Yavapai	1851			-	Zachary Taylor Millard Fillmore Franklin Pierce James Buchanan Abraham Lincoln Andrew Johnson Ulysses Grant Rutherford Hayes James Garfield Chester Arthur Grover Cleveland Benjamin Harrison William McKinley	1900
Bombardment of San Juan del Norte	Nicaragua				-	Franklin Pierce	July 13, 1854
Third Seminole War	Seminole	1855			-	Franklin Pierce James Buchanan	1858
Second Opium War	Qing Dynasty	1856			-	James Buchanan	Treaty of Tianjin June 18, 1858 1859
Redress for attack on U.S. Navy vessel	Paraguay	1859				James Buchanan
American Civil War	Confederate States of America	April 12, 1861			-	Abraham Lincoln Andrew Johnson	April 9, 1865 Reconstruction Reconstruction Amendments
Dakota War	Dakota Sioux	1862			-	Abraham Lincoln	Surrender at Camp Release September 26, 1862
Colorado War	Cheyenne Arapaho	1863			-	Abraham Lincoln	1865
Japanese Conflict	Chōshū Domain	1863			-	Abraham Lincoln	1864
Comanche Campaign	Cheyenne Arapaho Comanche Kiowa	1867			-	Andrew Johnson Ulysses Grant	1875
General Sherman incident	Joseon Dynasty	August 1866			-	Andrew Johnson	August 1866
Red Cloud's War	Lakota Cheyenne Arapaho	1866			-	Andrew Johnson	Treaty of Fort Laramie (1868)
Korean Expedition	Joseon Dynasty	June 10, 1871			-	Ulysses Grant	June 11, 1871 Treaty of Amity and Commerce 1882
Modoc War	Modoc	July 6, 1872			-	Ulysses Grant	June 4, 1873
Black Hills War	Lakota Northern Cheyenne Arapaho	1876			-	Ulysses Grant	1877
Nez Perce War	Nez Perce	1877			-	Ulysses Grant	1877
Nez Perce War	Bannock Shoshone	1878			-	Rutherford B. Hayes	1878
Cheyenne War	Cheyenne	1878			-	Rutherford B. Hayes	1879
Sheepeater Indian War	Shoshone	1879			-	Rutherford B. Hayes	1879
White River War	Ute	1879			-	Rutherford B. Hayes	1880
Ghost Dance War	Sioux	1890			-	Benjamin Harrison	1891
Spanish-American War Cuban War of Independence Puerto Rican Campaign Pacific Campaign	Spain	April 25, 1898	42-35	310-6	-	William McKinley	Treaty of Paris (December 10, 1898)
Philippine Insurrection	First Philippine Republic Revolutionary forces Pulajanes	1899			-	William McKinley Theodore Roosevelt	July 4, 1902

20th Century

War or conflict	Opponent(s)	Initial authorization	Votes		UNSCR	President(s)	Conclusion(s)
			Senate	House
Moro Rebellion	Sultanate of Sulu Moro	May 24, 1900			-	William McKinley Theodore Roosevelt William Taft	1913
Boxer Rebellion	Righteous Harmony Society Qing Empire	September 28, 1900			-	William McKinley	China Relief Expedition, 1900
Occupations of Honduras	Honduran revolutionaries	March 23, 1903			-	Theodore Roosevelt William Taft Woodrow Wilson Warren Harding Calvin Coolidge	April 21, 1925
Occupation of Cuba	Cuban revolt	Platt Amendment 1906			-	Theodore Roosevelt William Taft Woodrow Wilson Warren Harding Calvin Coolidge Herbert Hoover Franklin Roosevelt	Treaty of Relations 1934
Occupation of Nicaragua	Liberal rebels	May, 1910			-	William Taft Woodrow Wilson Warren Harding Calvin Coolidge Herbert Hoover Franklin Roosevelt	1933
Occupation of Haiti	Haiti Caco rebels	July 28, 1915			-	Woodrow Wilson Warren Harding Calvin Coolidge Herbert Hoover Franklin Roosevelt	August 1, 1934
Occupation of the Dominican Republic	Dominican Republic	1916			-	Woodrow Wilson Warren Harding Calvin Coolidge	1924

• • Guatemalan Conflict, 1907 - 1933 (time span of U.S. involvement)
  • First Panama Conflict, 1908 (time span of U.S. involvement)

• Mexican Revolution, 1914 - 1918 (time span of U.S. involvement)
  • Battle of Veracruz, 1914
  • Battle of Columbus, 1916
  • Battle of Carrizal, 1916
  • Battle of Bear Valley, 1918
  • Battle of Ambos Nogales, 1918
• World War I, 1917 – 1918 (time span of U.S. involvement)
  • European Theatre, 1917 - 1918
  • First Battle of the Atlantic, 1917-1918
• Russian Revolution, 1918 - 1920 (time span of U.S. involvement)
  • Polar Bear Expedition, 1918 - 1919
  • Siberian Expedition, 1918 - 1920
• World War II, 1941 – 1945 (time span of U.S. involvement)
  • Second Battle of the Atlantic, 1941 - 1945
  • Pacific War, 1941 - 1945
  • African Theatre, 1942 - 1943
  • European Theatre, 1942 - 1945
• Greek Civil War, 1947 - 1949 (time span of U.S. involvement)
• Korean War, 1950 - 1953
  • South Korean Campaign, 1950 - 1953
  • North Korean Campaign, 1950 - 1953
• 1958 Lebanon crisis, 1958 (time span of U.S. involvement)
  • Operation Blue Bat, 1958
• Cuban Missile Crisis, 1961 (time span of U.S. involvement)
  • Bay of Pigs Invasion, 1961
• Vietnam War, 1962 - 1975 (time span of U.S. involvement)
  • Laotian Civil War, 1962 - 1973
  • Cambodian Civil War, 1969 - 1970
• Second Dominican Republic Conflict, 1965 - 1966
  • Operation Powerpack, 1965 - 1966
• Second Korean War, 1966 - 1976
• Contra War, El Salvador, 1981 - 1990
• Libya Conflict, 1981 - 1989 (time span of U.S. involvement)
  • First Action in the Gulf of Sidra, 1981
  • Second Action in the Gulf of Sidra, 1986
  • 1986 bombing of Libya, 1986
  • Third Action in the Gulf of Sidra, 1989
• Grenada Conflict, 1983 (time span of U.S. involvement)
  • Operation Urgent Fury, 1983
• Iran–Iraq War, 1987 - 1989 (time span of U.S. involvement)
  • Operation Earnest Will, 1987 - 1988
  • Operation Prime Chance, 1987 - 1989
  • Operation Eager Glacier, 1987
  • Operation Nimble Archer, 1987
  • Operation Praying Mantis, 1988
• Second Panama Conflict, 1989 - 1990 (time span of U.S. involvement)
  • Operation Just Cause, 1989 - 1990
• Persian Gulf War, Iraq, 1991 (time span of U.S. involvement)
  • Operation Desert Shield, 1991
  • Operation Desert Storm, 1991
• Iraq Conflict, 1991 - 2003 (time span of U.S. involvement)
  • Operation Provide Comfort, 1991 - 1996
  • Operation Northern Watch, 1997 - 2003
  • Operation Southern Watch, 1992 - 2003
  • Operation Desert Fox, 1998
  • Operation Southern Focus, 2002 - 2003
• Somali Civil War, 1992 - 1994 (time span of U.S. involvement)
  • Operation Provide Relief, 1992
  • Operation Restore Hope, 1992 - 1994
  • United Nations Operation in Somalia I, 1992
  • United Nations Operation in Somalia II, 1993 - 1995
• First Haitian Rebellion, 1994 (time span of U.S. involvement)
  • Operation Uphold Democracy, 1994 - 1995
• Yugoslav wars, 1994 - 1999 (time span of U.S. involvement)
  • Bosnian Conflict, 1994 - 1995
  • Kosovo Conflict, 1997 - 1999

21st Century

• War on Terrorism, 2001 - present
  • Operation Enduring Freedom - Afghanistan 2001 - present
  • Operation Enduring Freedom - Philippines 2002 - present
  • Operation Enduring Freedom - Horn of Africa 2002 - present
  • Operation Iraqi Freedom, 2003 - present
  • War in North-West Pakistan, 2004 - present
  • Operation Enduring Freedom - Trans Sahara 2007 - present
• Second Haitian Rebellion, 2004 (time span of U.S. involvement)
  • United Nations Stabilization Mission in Haiti, 2004 - present

Lists of wars involving North American countries Sovereign states Antigua and Barbuda · Bahamas · Barbados · Belize · Canada · Costa Rica · Cuba · Dominica · Dominican Republic · El Salvador · Grenada · Guatemala · Haiti · Honduras · Jamaica · Mexico · Nicaragua · Panama1 · Saint Kitts and Nevis · Saint Lucia · Saint Vincent and the Grenadines · Trinidad and Tobago1 · United States Dependencies and other territories Anguilla · Aruba1 · Bermuda · British Virgin Islands · Cayman Islands · Greenland · Guadeloupe · Martinique · Montserrat · Netherlands Antilles1 · Puerto Rico · Saint Barthélemy · Saint Martin · Saint Pierre and Miquelon · Turks and Caicos Islands · United States Virgin Islands 1 Territories also in or commonly considered to be part of South America.