early american wars By jacqlyn.robbins Apr 19, 1775 The Battles of Lexington and Concord Period: Dec 19, 1777 to Jun 19, 1778 The Winter at Valley Forge Jan 17, 1778 The Battle of Cowpens Sep 21, 1780 Benedict Arnold turns traitor Aug 19, 1812 The USS Constitution defeats the HMS Guerriere Period: Sep 12, 1814 to Sep 15, 1814 The Battle of Baltimore Jan 8, 1815 The Battle of New Orleans 1828 The Election of Andrew Jackson Feb 23, 1836 The Battle of the Alamo Feb 2, 1848 Mexico loses California, New Mexico, and Arizona Nov 6, 1860 Abraham Lincoln Elected President Dec 20, 1860 South Carolina secedes from the United States Jul 21, 1861 The First Battle of Bull Run Apr 9, 1863 The Treaty at Appomattox Courthouse Jul 1, 1863 The Battle of Gettysburg Feb 15, 1898 The sinking of the USS Maine May 1, 1898 Battle of the Philippines (Spanish American War, not World War II) Mar 3, 1931 The Adoption of the Star Spangled Banner as the National Anthem