Wars Throughout American History By 24lbarbour Period: 1754 to 1763 French and Indian War Period: Apr 19, 1775 to Sep 3, 1783 American Revolutionary War Period: 1812 to 1815 War of 1812 Period: Apr 12, 1861 to Apr 9, 1865 American Civil War Period: Apr 21, 1898 to Dec 10, 1898 Spanish-American War Period: Jul 28, 1914 to Nov 11, 1918 World War I Period: Sep 1, 1939 to Sep 2, 1945 World War II Period: 1946 to 1991 Cold War Period: 1950 to 1953 Korean War Period: Nov 1, 1955 to Apr 30, 1975 Vietnam War