Build up to the Civil War By eniJai Aug 8, 1846 Wilmot Proviso Feb 2, 1848 Treaty of Guadalupe-Hidalgo Jan 29, 1850 Compromise of 1850 May 30, 1854 Kansas-Nebraska Act May 25, 1856 Pottawatomie Massacre Oct 15, 1858 Lincoln-Douglas Election Nov 6, 1860 Lincoln Elected President Dec 20, 1860 South Carolina Secedes from the Union Sep 12, 1862 Harper's Ferry