After the legal importation of slaves from outside the country ended in 1808, the spread of slavery into the states bordering the Gulf of Mexico would not have been possible without the enormous uprooting of people from Maryland and Virginia. Almost one million slaves, Baptist estimates, were transported to the cotton fields from the Upper South in the decades before the Civil War.The domestic slave trade was highly organized and economically efficient, relying on such modern technologies as the steamboat, railroad and telegraph. For African-Americans, its results were devastating. Since buyers preferred young workers “with no attachments,” the separation of husbands from wives and parents from children was intrinsic to its operation, not, as many historians have claimed, a regrettable side effect.