1. War of 1812
2. Mexican War (1846-1848)
3. Spanish-American War (1898)
4. WWI (1917-1918)
5. WWII (1941-1945)
The American Civil War (US Civil War 1861-1865) was undeclared.
Indian Wars were undeclared (1620-1890)
The Philippine War (1900-1902) was an INSURRECTION against the US
Korean War (1950-1953, a limited war-limited to conventional weapons only)
Vietnam War (a limited war-limited to conventional weapons only)
Operations: Urgent Fury (1983); Just Cause (1989); Desert Storm (1991); Restore Hope (1992/93); Kosovo/Bosnia (1995); Enduring Freedom (2001); Iraqi Freedom (2003).
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The War of 1812, the Mexican-American War, the Spanish-American War, World War I and World War II
5 War of 1812
Mexican-American War
Spanish-American War
World War I
World War II
1. War of 1812 2. Mexican War 1846-1848 3. Spanish-American War of 1898 4. WW1 1917-1918 5. WW2 1941-1945
The last time the US congress declared war was in 1941, when the US entered WW II following the attack on Pearl Harbor.