Independence By pb18858 Jul 4, 1776 Independence Sep 17, 1787 Ratification Apr 30, 1803 Lousiana Purchase Feb 14, 1820 Missouri Compromise Aug 21, 1831 Nat Turner Rebellion Mar 2, 1836 TX Independence Jan 2, 1848 Treaty of Guadelupe Hidalgo Jan 29, 1850 Compromise of 1850 Mar 6, 1857 Dredd Scott Decision Dec 20, 1860 South Carolina Secession Sep 17, 1862 Antietam Battle May 18, 1863 Vicksburg Battle Jul 1, 1863 Gettysburg Battle