early American wars By Toxic309 Period: 1775 to 1784 American revolution Apr 19, 1775 The Battles of Lexington and Concord 1777 The Winter at Valley Forge Sep 21, 1780 Benedict Arnold turns traitor Jan 17, 1781 The Battle of Cowpens Apr 19, 1808 The USS Constitution defeats the HMS Guerriere Period: Jun 18, 1812 to Feb 18, 1815 war of 1812 Sep 12, 1814 The Battle of Baltimore Jan 8, 1815 The Battle of New Orleans 1825 The Election of Andrew Jackson Feb 23, 1836 The Battle of the Alamo Feb 2, 1846 Mexico loses California, New Mexico, and Arizona Period: Apr 23, 1846 to Feb 2, 1848 Mexican-American war Dec 20, 1856 South Carolina secedes from the United States 1860 Abraham Lincoln Elected President Period: 1861 to 1865 civil war Jul 21, 1861 The First Battle of Bull Run Jul 1, 1863 The Battle of Gettysburg Apr 9, 1865 The Treaty at Appomattox Courthouse Feb 15, 1898 The sinking of the USS Maine Period: Apr 21, 1898 to Dec 10, 1898 Spanish-American war Period: Jul 28, 1914 to Nov 11, 1918 world war 1 1931 The Adoption of the Star Spangled Banner as the National Anthem