This January 1, 1863 document liberated all slaves in regions still under Confederate control
[DOC] [TLE] The Civil War of the United States: The Emancipation Proclamation ... [PAR] Jan 1, 2015 ... That on the first day of January, in the year of our Lord one thousand eight ... 
Around 20,000 to 50,000 slaves in regions where rebellion had already been ...