Major Wars and Conflicts French and Indian War 1754-1763 Revolutionary War 1775-1783 War of 1812 1812-1815 Mexican War 1846-1848 Civil War 1861-1865 Spanish American War 1898 World War I Apr 6 1917-Nov 11 1918 World War II Dec 7 1941-Dec 31 1946 Korean War Jun 25 1950-Jul 27 1953 Vietnam War Aug 4 1964-Jan 27 1973 Persian Gulf War Jan 17 1991-Feb 28 1991