Slavery in Maryland lasted over 200 years, from its beginnings in 1642 when the first Africans were brought as slaves to St. Mary's City, to its end after the Civil War. While Maryland developed similarly to neighboring Virginia, slavery declined here as an institution earlier, and it had the largest free black population by 1860 of any state. The early settlements and population centers of the province tended to cluster around the rivers and other waterways that empty into the Chesapeake Bay. Maryland planters cultivated tobacco as the chief commodity crop, as the market was strong in Europe. Tobacco was labor-intensive in both cultivation and processing, and planters struggled to manage workers as tobacco prices declined in the late 17th century, even as farms became larger and more effi