Domestic Slave Trade Explodes: One Million People Sold 1820–1865

With the Atlantic slave trade legally closed after 1808, a massive domestic trade emerged supplying enslaved labor to cotton and sugar frontiers in the Deep South. Historians estimate approximately one million enslaved people were sold in the interstate trade between 1820 and 1865 — roughly equivalent to the entire transatlantic trade to North America. Enslaved people were marched in coffles (chained columns) hundreds of miles south and west. The trade separated families systematically: scholars estimate one-third of first marriages and half of all parent-child relationships were broken by sale.