The document provides background information on the events leading up to the American Civil War from the 1840s through the start of the war in 1861. It discusses the growing political tensions around the issue of slavery and states' rights. Key events included the Missouri Compromise, the Kansas-Nebraska Act, Lincoln's election in 1860, and Confederate states beginning to secede from the Union. The document also outlines some of the military advantages held by the North compared to the South at the start of the war, such as population, industry, naval capabilities, and transportation infrastructure. It describes the Union's initial naval blockade strategy against the Confederacy.