Timeline By RB17 Jul 4, 1776 Independence Sep 17, 1787 Ratification of the Constitution Jul 4, 1803 Louisiana Purchase Jul 4, 1803 Louisiana Purchase Mar 3, 1820 Missouri Compromise Aug 21, 1831 Nat Turner Slave Mar 2, 1836 Texas Independence Feb 2, 1848 Treaty of Guadaleupe Hidalgo Sep 20, 1850 1850 Compromise May 30, 1854 Kansas Nebraska Act Mar 6, 1857 Drd Scott Decision Dec 20, 1860 South Carolina Secession Sep 17, 1862 Antietam May 18, 1863 Vicksburg Jul 1, 1863 Gettysburg