Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.
it bans slavery
Historians look for causes and effects that help to explain how and why events happened.
The Battle of Antietam was the single bloodiest day of the American Civil War and is considered one of the major turning points of the war. ... The North was able to use the victory to raise morale, keep the South from gaining diplomatic recognition, and emancipate the slaves in the rebel states.