▁US ▁On ▁ 1 ▁January ▁ 1 8 6 3 , ▁Abraham ▁Lincoln ▁signed ▁E man cip ation ▁Pro clam ation ▁free ing ▁slaves ▁in ▁areas ▁in ▁re bell ion ▁during ▁the ▁American ▁Civil ▁War ▁when ▁Union ▁troops ▁advanced ▁south . ▁The ▁Th ir teenth ▁Am end ment ▁( abol ition ▁of ▁sla very ▁and ▁invol unt ary ▁serv itude ) ▁was ▁rat ified ▁in ▁December ▁ 1 8 6 5 . ▁ ▁See ▁also ▁ ▁Ab ol ition ism ▁in ▁the ▁United ▁States ▁American ▁Des c end ants ▁of ▁S la very ▁( AD OS ) ▁Th ir teenth ▁Am end ment ▁to ▁the ▁United ▁States ▁Constitution ▁E man cip ation ▁Pro clam ation ▁Tim eline ▁of ▁abol ition ▁of ▁sla very ▁and ▁ser f dom ▁Col onial ▁history ▁of ▁the ▁United ▁States ▁Free ▁negro ▁Grand ▁Model ▁for ▁the ▁Province ▁of ▁Carolina ▁History ▁of ▁labor ▁law ▁in ▁the ▁United ▁States ▁History ▁of ▁sla very ▁in ▁Connecticut ▁History ▁of ▁sla very ▁in ▁Georgia ▁History ▁of ▁sla very ▁in ▁Maryland ▁History ▁of ▁sla very ▁in ▁Massachusetts ▁History ▁of ▁sla very ▁in ▁New ▁Jersey ▁History ▁of ▁sla very ▁in ▁New ▁York ▁History ▁of ▁sla very ▁in ▁Pennsylvania ▁History ▁of ▁sla very ▁in ▁Rh ode ▁Island ▁History ▁of ▁sla very ▁in ▁Virginia ▁Ind ent ured ▁serv itude ▁in ▁the ▁Amer icas ▁Red em ption er ▁Ind ent ured ▁serv itude ▁in ▁Pennsylvania ▁Ind ent ured ▁serv itude ▁in ▁Virginia ▁S lave ▁Trade ▁Act ▁S la very ▁among ▁Native ▁Americans ▁in ▁the ▁United ▁States ▁ ▁Indian ▁slave