After the Emancipation Proclamation and the 13th Amendment Slavery kept going on for another 50 years. First, even after the 13th Amendment was signed, Texas still had slavery for another 2 years because they never got the memo. It wasn’t until Juneteenth when Major General Gordon Granger, landed at Galveston, Texas and told them to knock it off. But even after that they had “Convict leasing” for another 50 years.
The 23th Amendment says “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.”
Tens of thousands of black Americans who committed no real crime were kidnapped off the streets by corrupt local sheriffs, convicted in informal local courts for vague “crimes” such as vagrancy, issued fines they couldn’t pay, and sold to businesses to work in mines, timber yards, farms and railroads in conditions often worse than slavery.