The document discusses Lincoln issuing the Emancipation Proclamation in 1863, which freed slaves in Confederate states. It provides background on Lincoln's evolving views on slavery prior to the war. Key reasons for issuing the proclamation included criticism from abolitionists, changes in public opinion, and a desire to undermine the Confederacy. The proclamation was opposed in the South but had mixed response in the North. It encouraged some slaves to escape and undermined European support for the Confederacy.