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 US combat forces' participation in wars War in the context of this list is broadly construed to be a direct armed conflict between organized US military forces and organized forces of (a) belligerent(s).
(Note: Ongoing wars are indicated in bold and with red bars.)
Rank War Dates DurationDuration (graphical representation) 1 War in Afghanistan 2001 – 2021 years (19 years, 10 months) 2 US intervention in Somalia 2007 – present years () 3 Vietnam War 1955 – 1975 years (19 years, 5 months) 4 Occupation of Haiti 1915 – 1934 years 5 US intervention in Yemen 2002, 2009 – present years () 6 Philippine–American War and Moro Rebellion 1899 – 1913 years 7 War in North-West Pakistan 2004 – 2017 years8War against the Islamic State2013 – present years () 9 Operation Inherent Resolve 2014 – 2026 years () 10 US military intervention in Niger 2013 – 2024 years 11 Northwest Indian War 1785 – 1795 years 12 Iraq War 2003 – 2011 years 13 American Revolutionary War 1775 – 1783 years (8 years, 5 months) 14 Second Seminole War 1835 – 1842 1}} years(6 years, 7 month) 15 First Barbary War 1801 – 1805 years (4 years, 1 month) 16 American Civil War 1861 – 1865 years 17 World War II 1941 – 1945 years (3 years, 8 months) 18 Korean War 1950 – 1953 years (3 years, 1 month) 19 War of 1812 1812 – 1814 years (2 years, 6 months) 20 Mexican–American War 1846 – 1848 years (1 year, 9 months) 21 World War I 1917 – 1918 years (1 year, 7 months) 22 Great Sioux War of 1876 1876 – 1877 years (1 year, 3 months) 23 2026 Iran War2026-02-28 – present years ( months) 24 Gulf War 1990 – 1991 years (7.2 months) 25 Whiskey Rebellion 1794 – 1794 years (4.8 months) 26 Spanish–American War 1898 – 1898 days 27 Kosovo War 1999 – 1999 days 28 Invasion of Panama 1989 – 1990 days 29 Invasion of Grenada 1983-10-25 – 1983-10-29 (3.5) days 30 Twelve-Day War 2025-06-22 – 2025-06-24 days 31 Bay of Pigs Invasion 1962-04-19 1 day 32 2026 United States intervention in Venezuela 2026-01-03 <1 day(2 hours 28 minutes)
Sources are found in the main articles of each war, as well as the Associated Press.
See also United States military deployments Foreign policy of the United States United States Department of Defense Declaration of war by the United States Military history of the United States Foreign interventions by the United States United States Armed Forces United States military casualties of war List of wars involving the United States List of conflicts by duration
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