Causes of Civil War By tessa0515 Mar 6, 1820 The Missouri Compromise Sep 1, 1842 Compromise Tariff Act Feb 2, 1848 The Mexican War Ends Jan 29, 1850 Compromise of 1850 May 2, 1850 Underground Railroad May 2, 1852 Political Party Splits May 2, 1854 Bleeding Kansas May 21, 1856 Charles Sumner is attacked by Preston on floor of the senate Oct 16, 1859 Harpers Ferry Mar 4, 1861 The Election of Abraham Lincoln