War or conflict Opponent(s) Initial authorization Votes President Conclusion
Senate House
Quasi-War France Act Further to Protect the Commerce of the United States
July 9, 1798 J. Adams Convention of 1800 (Treaty of Mortefontaine)
First Barbary War Barbary States 1801[citation needed] Jefferson
Second Barbary War Barbary States 1815[citation needed] Madison
Raid of slave traffic Africa 1820[citation needed]
Redress for attack on U.S. Navy vessel Paraguay 1859[citation needed] Buchanan
Intervention during the Russian Civil War Bolshevist Russia 1918[citation needed] Wilson
Lebanon crisis of 1958 Rebels 1958[citation needed] Eisenhower
Vietnam War National Liberation Front, later Democratic Republic of Vietnam Gulf of Tonkin Resolution, August 7, 1964 88-2 416-0 Kennedy, Johnson, Nixon American Force withdrew.
Multinational Force in Lebanon Shia and Druze miltias; Syria S.J.R. 159
September 29, 1983 54-46 253-156 Reagan Force withdrew in 1984
Persian Gulf War, also known as Operation Desert Storm Iraq H.R.J. Res. 77
January 12, 1991 52-47 250-183 George H. W. Bush The United Nations Security Council drew up terms for the cease-fire, April 3, 1991
2001 war in Afghanistan, also known as Operation Enduring Freedom Taliban government of Afghanistan and al-Qaida S.J. Res. 23
September 14, 2001 98-0 420-1 George W. Bush Ongoing, disputed
Iraq War, also known as Operation Iraqi Freedom Iraq H.J. Res. 114,
October 16, 2002 77-23 296-133 Ongoing, disputed