December 28, 2012 | SuzyQ
President Lincoln issued the Emancipation Proclamation on January 1, 1863. It declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free." Every advance of Union troops into the Confederacy expanded former slaves' freedom. Additionally, the Proclamation allowed black men into the military, and by the end of the Civil War almost 200,000 black soldiers and sailors had joined and fought for the Union cause.
Lincoln's Emancipation Proclamation: the end of slavery in America by Allen C. Guelzo
Abraham Lincoln and the road to emancipation, 1861-1865 by William K. Klingaman