U.S. History By nawilliams19 Oct 12, 1492 Christopher Columbus first lands in the Americas. May 7, 1607 The founding of Jamestown. Period: Apr 19, 1775 to Sep 3, 1783 The Revolutionary War. Jul 4, 1776 The Declaration of Independence Sep 17, 1787 The U.S. Constitution is written. Apr 30, 1803 The Louisiana Purchase. Period: Jun 18, 1812 to Mar 23, 1815 The War of 1812 Mar 3, 1820 The Missouri Compromise. Period: Apr 25, 1846 to Feb 2, 1848 The Mexican-American War. Jan 29, 1850 Compromise of 1850 Period: Apr 12, 1861 to May 9, 1865 The American Civil War. Period: Jan 1, 1865 to Jan 1, 1877 Reconstruction Era. Period: Jan 1, 1870 to Jan 1, 1900 The Gilded Age