itme line By thanh lu Apr 25, 1846 the start of the mexican war Aug 8, 1846 the wilmot provist Feb 2, 1848 the end of the mexican war Sep 1, 1850 the compermise of 1850 Mar 20, 1852 uncle tom's cabin come out as a book Nov 1, 1852 Dred Scott decision May 20, 1854 Republican Party officially organizes May 30, 1854 Congress passes the Kansas-Nebraska Act May 21, 1856 Proslavery attack on Lawrence Kansas. May 22, 1856 The caning of Charles Sumner May 25, 1856 Pottawatomie Creek Massacres Jan 1, 1858 Lincoln-Douglas Debates Oct 18, 1859 John Brown's raid on Harper's Ferry Nov 6, 1860 The Election of 1860-Lincoln wins! Dec 22, 1860 South Carolina secedes Show Less