List of the lengths of United States participation in wars
This article contains the length and list of major conflicts, invasions and wars participated by the United States Armed Forces since its creation in 1775.
Lengths of U.S. combat forces' participation in wars
War in the context of this list is broadly construed to be a direct armed conflict between organized U.S. military forces and organized forces of (a) belligerent(s).
(Note: Ongoing wars are indicated in bold and with red bars.)
Rank
War
Dates
Duration
Duration (graphical representation)
1
War in Afghanistan
2001 – 2021[ 1]
19.9 years (19 years, 10 months)
2
US intervention in Yemen
2002 – present [ 2]
22.0 years (22 years)
3
Vietnam War
1955 – 1975[ 3] [ 4] [ 5] [ 6] [ a]
19.4 years (19 years, 5 months)
4
Occupation of Haiti
1915 – 1934
19 years
5
Second US Intervention in the Somali Civil War
2007 – present [ 7] [ 8] [ 9]
17.9 years (17 years, 10 months)
6
Philippine–American War and Moro Rebellion
1899 – 1913
14 years
7
War in North-West Pakistan
2004 – 2017
13 years
7
US military intervention in Niger
2013 – 2024 [ 10] [ 11] [ 12] [ 13] [ 14]
11 years
8
Operation Inherent Resolve
2014 – present
10.4 years (10 years, 5 months)
9
Northwest Indian War
1785 – 1795
10 years
10
Iraq War
2003 – 2011[ 15] [ 16] [ 17] [ 18] [ 19] [ 20]
8.7 years (8 years, 9 months)
11
American Revolutionary War
1775 – 1783
8.4 years (8 years, 5 months)
12
Second Seminole War
1835 – 1842
6.7 years (6 years, 7 month)
13
First Barbary War
1801 – 1805
4.1 years (4 years, 1 month)
14
American Civil War
1861 – 1865
4.1 years
15
World War II
1941 – 1945
3.7 years (3 years, 8 months)
16
Korean War
1950 – 1953
3.1 years (3 years, 1 month)
17
War of 1812
1812 – 1814
2.5 years (2 years, 6 months)
18
Red Cloud's War
1866 – 1868
1.8 years (1 year, 9 months)
19
Mexican–American War
1846 – 1848
1.8 years (1 year, 9 months)
20
World War I
1917 – 1918
1.6 years (1 year, 7 months)
21
Russian Civil War
1918 – 1920[ 21]
1.6 years (1 year, 7 months)
22
Great Sioux War of 1876
1876 – 1877
1.2 years (1 year, 3 months)
23
Gulf War
1990 – 1991[ 22] [ b]
0.6 years (7.2 months)
24
Whiskey Rebellion
1794 – 1794
0.4 years (4.8 months)
25
Spanish–American War
1898 – 1898
114 days
26
Kosovo War
1999 – 1999[ 23]
79 days
27
Invasion of Panama
1989 – 1990
42 days
28
Invasion of Grenada
1983-10-25 – 1983-10-29
4 (3.5) days
29
Bay of Pigs Invasion
1961-04-19
1 day[ c]
Sources are found in the main articles of each war, as well as the Associated Press. [ 26] [ 27]
See also
Notes
^ Direct U.S. involvement ended in 1973 with the Paris Peace Accords
^ (33)The term "Persian Gulf War" means the period beginning on August 2, 1990, and ending on the date thereafter prescribed by Presidential proclamation or by law. 38 U.S.C. § 101
^ The Bay of Pigs invasion was conducted by Brigade 2506 , a group of Cuban exiles recruited and equipped by the CIA as part of a covert operation , and trained by instructors from the CIA and U.S. Army Special Forces, U.S. Air Force, and Air National Guard.[ 24] The botched invasion took three days: Americans were initially not authorized to participate in the invasion. However, on the last day of the failed operation (April 19, 1961), U.S. air support was authorized, and eight Alabama Air National Guard members flew into Cuban airspace.[ 25]
References
^ "Last troops exit Afghanistan, ending America's longest war" . Associated Press. August 30, 2021.
^ "US special forces secretly deployed to assist Saudi Arabia in Yemen conflict" . The Independent . Retrieved May 9, 2023 .
^ Rohn, Alan (March 26, 2013). "When was the end of the Vietnam War?" . The Vietnam War . Retrieved January 28, 2019 .
^ "Defense.gov News Release: NAME OF TECHNICAL SERGEANT RICHARD B. FITZGIBBON TO BE ADDED TO THE VIETNAM VETERANS MEMORIAL" . U.S. Department of Defense . November 6, 1998. Archived from the original on July 14, 2015. Retrieved April 19, 2021 .
^ U.S. Department of Defense 1998
^ Lawrence 2009 , p. 20
^ "Biden approves deployment of hundreds of US troops to Somalia" . aljazeera.com . June 4, 2022.
^ "New Somali President Welcomes Return of US Troops" . voanews.com . June 4, 2022.
^ "US increases military support for Somalia against al-Shabab" . Defense News . Defense News. March 1, 2023. Retrieved March 1, 2023 .
^ "America has lost the war against Islamist terror in Africa" . The Spectator . May 3, 2024.
^ "After Failure in Niger, U.S. Africa Policy Needs a Reset" . Foreign Policy . July 3, 2024.
^ "The US War on Terror in West Africa Is a Continuing Disaster" . Jacobin . July 3, 2024.
^ "America's $280 Million Military Mission in Niger Ends in Failure" . Reason . July 3, 2024.
^ "Niger ends military agreement with US, calls it 'profoundly unfair' " . CNN . CNN. April 12, 2024. Retrieved April 12, 2024 .
^ "US military deaths in Iraq war at 4,452" . San Diego Union-Tribune . May 3, 2011. Retrieved April 19, 2021 .
^ "Why can't we stop our wars?" . Pittsburgh Post-Gazette . May 18, 2011. Retrieved April 19, 2021 .
^ Wood, David (April 27, 2011). "Robert Gates' Pentagon Legacy: Unfinished Wars, Unfinished Budget Reform" – via Huff Post.
^ "Obama May Face Tough Decision as Iraqi Leader Signals U.S. Troops Could Stay" .
^ "Pentagon Rethinks Iraq pull-out Plans" . Financial Times .
^ Terkel, Amanda (May 11, 2011). "Iraq Withdrawal Date For U.S. Troops May Be Pushed Back Beyond 2011" – via Huff Post.
^ Robert L. Willett, "Russian Sideshow" (Washington, D.C., Brassey's Inc., 2003), page 267
^ "Our Longest U.S. War: Medical Treatments for Gulf War Illness Remain Elusive | Swords to Plowshares" . Archived from the original on February 26, 2014. Retrieved July 12, 2013 .
^ "A Kosovo Chronology | War In Europe | FRONTLINE | PBS" . www.pbs.org . Retrieved April 19, 2021 .
^ The Bay of Pigs Invasion , CIA (April 18, 2016).
^ Bill Bowden, Files link Arkansans to role in Bay of Pigs: Kennedy, aides discuss it in 1963 tapes , Arkansas Democrat-Gazette (April 18, 2021).
^ "U.S. Participation in Major Wars" . Fox News . Associated Press. November 25, 2006. Retrieved July 11, 2017 .
^ "U.S. involved in Iraq war longer than it was in World War II" . UT San Diego . November 25, 2006. Archived from the original on October 20, 2012. Retrieved April 19, 2021 .
Bibliography
U.S. Department of Defense (DoD) (November 6, 1998). "Name of Technical Sergeant Richard B. Fitzgibbon to be added to the Vietnam Veterans Memorial" . DoD.
Lawrence, A. T. (2009). Crucible Vietnam: Memoir of an Infantry Lieutenant . Jefferson, North Carolina: McFarland. ISBN 978-0-786-44517-2 .
Armed conflicts involving the Armed Forces of the United States
Listed chronologically
Domestic Foreign Related