Lincoln recognized that the Emancipation Proclamation would have to be followed by a constitutional amendment in order to guarantee the abolishment of slavery. The 13th amendment was passed at the end of the Civil War before the Southern states had been restored to the Union and should have easily passed the Congress
because due to the expansion of the agricultural the African slave have had the chance to be free and due to the expansion agriculture from Brazil into Carribbean drove the expansion of the trade
