The document summarizes key events and compromises related to the expansion of slavery in the United States between 1783-1860. It discusses the Three-Fifths Compromise, the Missouri Compromise, the Compromise of 1850 including the Fugitive Slave Act, the Kansas-Nebraska Act establishing popular sovereignty, the Dred Scott decision, the Lincoln-Douglas debates, and the election of Abraham Lincoln in 1860 which further divided the North and South and ultimately led to the Civil War.