Events in American Slavery By Loginos Sep 3, 1783 Revolutionary War ends Jul 13, 1787 Passage of the Northwest Ordinance of 1787 Sep 17, 1787 Signing of the Constitution Oct 24, 1793 Eli Whitney invents the improved Cotton Gin Apr 30, 1803 Louisiana Purchase Jul 18, 1812 The War of 1812 begins Apr 27, 1816 Passage of the Tariff of 1816 Mar 3, 1820 Missouri Compromise May 28, 1830 Indian Removal Act Jan 1, 1831 William Lloyd Garrison starts The Liberator 1831 Trail of Tears begins Aug 21, 1831 Nat Turner Rebellion Mar 2, 1836 Declaration of Texan Independance May 1, 1845 Frederick Douglas publishes his first autobiography Aug 8, 1846 Wilmot Proviso Jan 24, 1848 Gold is discovered in California Feb 2, 1848 Treaty of Guadalupe Hidalgo 1850 Compromise of 1850 Various dates in September of 1850 1854 Bleeding Kansas begins Mar 6, 1854 Dred Scott Decision Mar 20, 1854 Birth of the Republican Party May 30, 1854 Kansas-Nebraska Act 1856 Stowe publishes Uncle Tom's Cabin May 23, 1856 Attack on Charles Sumner 1859 Blake is published by Martin Delany Oct 16, 1859 John Brown's Raid Nov 6, 1860 Lincoln is elected president Dec 20, 1860 South Carolina secedes Apr 12, 1861 Attack on Fort Sumter Dec 6, 1865 Passage of the 13th Amendment Jul 9, 1868 Passage of the 14th Amendment