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columns copied from http://www.historyguy.com/american_military_history.htmlSpreadsheet columns added for calculation purposes
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American Military History State of War by Calendar YearsCalendar Years without War
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Primary Name of Conflict Dates of Conflict
(U.S. Involvement Only)
Type of Conflict Primary Opponent(s)
of the United States
BeginEndBeginEnd16
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The American Revolution1775-1783Inter-State and Colonial WarGreat Britain17751783177517830
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The Indian Wars1775-1890Wars of ImperialismNative (Indian) Tribes and Nations of North America17751890177518900
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Shay's Rebellion1786-1787RebellionAnti-(state)Government Rebels vs. Massachusetts17861787177518900
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The Whiskey Rebellion1794RebellionAnti-Tax Rebels in Western Pennsylvania17941794177518900
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Quasi-War With France1798-1800Inter-State (Naval) WarFrance17981800177518900
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Fries's Rebellion "The Hot Water War"1799RebellionAnti-Tax Rebels in Pennsylvania17991799177518900
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The Barbary Wars1800-1815Inter-State WarThe Barbary States (Tripoli, Algiers & Morocco)18001815177518900
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The War of 18121812-1815Inter-State WarGreat Britain18121815177518900
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Mexican-American War1846-1848Inter-State WarMexico18461848177518900
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U.S. Slave Rebellions1800-1865Slave RebellionsVarious Slave groups18001865177518900
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"Bleeding Kansas"1855-1860Civil War (state of Kansas)Pro-Slavery vs. Anti-Slavery Kansans18551860177518900
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Brown's Raid on Harper's Ferry1859RebellionAnti-Slavery Rebels (Led by John Brown)18591859177518900
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United States Civil War1861-1865Civil WarUnited States (The North) vs. The Confederate States (The South)18611865177518900
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U.S. Intervention in Hawaiian Revolution1893Internal Rebellion & Foreign InterventionHawaiian Government18931893189318933
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The Spanish-American War1898Inter-State WarSpain18981898189818985
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U.S. Intervention in Samoan Civil War1898-1899Civil War & Foreign InterventionSamoan Faction18981899189818990
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U.S.-Philippine War1899-1902Colonial War, War of ImperialismThe Philippines18991902189819020
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Boxer Rebellion1900Internal Rebellion & Foreign InterventionChinese Government & "Boxer" Rebels19001900189819020
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The Moro Wars1901-1913Colonial WarsPhilippine Muslim Rebels19011913189819130
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U.S. Intervention in Panamanian Revolution1903Secessionist Revolution & Foreign InterventionColombia19031903189819130
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The Banana Wars1909-1933Civil Wars & Foreign InterventionVarious Rebel Groups In Central America19091933189819330
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U.S. Occupation of Vera Cruz1914Inter-State WarMexico19141914189819330
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Pershing's Raid Into Mexico1916-1917Inter-State, Border WarMexican Government & Mexican Rebels ("Bandits")19161917189819330
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World War I1917-1918 (American involvement only)Inter-State WarGermany19171918189819330
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Allied Intervention in Russian Civil War1919-1921Civil War & Foreign InterventionRussian Bolshevik (Soviet) Government19191921189819330
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World War II1941-1945 (American involvement only)Inter-State WarGermany, Japan & Italy19411945194119458
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The Cold War1945-1991Global Inter-State Cold WarThe Soviet Union & Communist China19451991194119910
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The Korean War1950-1953Inter-State WarNorth Korea & China19501953194119910
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The Second Indochina War "Vietnam War"1956-1975Civil War, Inter-State WarNorth Vietnam & South Vietnamese "Viet Cong" Rebels19561975194119910
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U.S. Intervention in Lebanon1958Civil War & Foreign InterventionNo real foe for U.S. Troops landed to support Lebanon Gov.19581958194119910
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Dominican Intervention1965Civil War & Foreign InterventionRebels in the Dominican Republic19651965194119910
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The Mayaguez Rescue Operation News Story1975 (May 15)Hostage Rescue & Inter-State ConflictKhmer Rouge Guerrillas (the new government of Cambodia)19751975194119910
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Iranian Hostage Crisis and Rescue Attempt-- "Desert One" or "Operation Eagle Claw"1980 (April 25)Hostage Rescue & Inter-State ConflictIran19801980194119910
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U.S. Libya Conflict1981, 1986Inter-State WarLibya19811981194119910
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U.S. Intervention in Lebanon " Bombing of the Marine Barracks "1982-1984Civil War,Foreign Intervention & Inter-State WarSyria & Various Muslim and Leftist Lebanese Militias19821984194119910
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U.S. Invasion of Grenada1983Inter-State WarMarxist Grenadian Faction & Cuba19831983194119910
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U.S. Libya Conflict1981, 1986Inter-State WarLibya19861986194119910
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The Tanker War "Operation Earnest Will"1987-1988Inter-State WarIran19871988194119910
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U.S. Invasion of Panama1989Inter-State WarPanama19891989194119910
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Second Persian Gulf War "Operation Desert Storm"1991Inter-State WarIraq19911991194119910
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"No-Fly Zone" War1991-2003Inter-State WarIraq19912003194120030
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U.S. Intervention in Somalia1992-1994Civil War & Foreign InterventionVarious Somali Militias19921994194120030
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NATO Intervention in Bosnia (Operation Deliberate Force) Summary1994-1995Civil War,Foreign Intervention & Inter-State WarBosnian Serb Rebels19941995194120030
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U.S. Occupation of Haiti1994Foreign InterventionHaitian Government19941994194120030
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U.S. Embassy bombings and strikes on Afghanistan and Sudan (The bin Laden War)August, 1998Terrorist ConflictThe embassy bombings in August, 1998 by Osama bin Laden caused hundreds of deaths in Kenya and Tanzania. The U.S. retaliated by launching Tomahawk Cruise Missiles at suspected terrorist targets in Afghanistan and Sudan.19981998194120030
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"Desert Fox" Campaign (part of U.S./Iraq Conflict)December, 1998Inter-State WarIraq19981998194120030
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Kosovo War Kosovo Links1999Civil War, Foreign Intervention & Inter-State WarYugoslavia/Serbia19991999194120030
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Attack on the USS ColeOct/12/2000Terrorist ConflictTerrorists associated with Osama bin Laden20002000194120030
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Attack on the World Trade Center and the PentagonSep/11/2001Terrorist ConflictOsama bin Laden's al-Qaida organization20012001194120030
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Afghanistan War (Operation Enduring Freedom)October 7, 2001-PresentWar against TerrorismThe Taliban and Osama bin Laden's Al-Qaida organization20012015194120150
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Third Persian Gulf War "Operation Iraqi Freedom"March 19, 2003-December 31, 2011Inter-State WarIraq20032011194120150
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Intervention in HaitiMarch, 2004Foreign Intervention in a civil conflictHaiti20042004194120150
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Intervention in Somali Civil War (aiding Ethiopia and the Transitional Government of Somalia during the Ethiopian intervention in the Somali Civil War) See also: U.S. Operations Against al-Qaida in Somalia (2006-Present)Dec., 2006-2009Foreign Intervention in a civil conflictThe Islamic Courts Union and Al-Qaida20062009194120150
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Libyan WarMarch, 2011-Oct. 31, 2011Foreign Intervention in a civil conflictLibyan leader Muamar Gadhafi20112011194120150
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Hunt for Joseph Kony (LRA War)December, 2011-2017Foreign Intervention in a civil conflictJoseph Kony and the LRA guerrilla army20112017194120170
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ISIS WarAugust, 2014-OngoingForeign Intervention in a civil conflictIslamic State Jihadist forces in Iraq, Syria, Yemen, Libya20142019194120190
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U.S. Missile Strike on SyriaApr/07/2017Foreign Intervention in a civil conflictSyria20172017194120190
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