The areas of Southern and Eastern Shore Maryland, especially those on the Chesapeake Bay (which neighbored Virginia), which had prospered on the tobacco trade and slave labor, were generally sympathetic to the South, while the central and western areas of the state, especially Marylanders of German origin, had stronger economic ties to the North and thus were pro-Union. Not all blacks in Maryland were slaves. The 1860 Federal Census showed there were nearly as many free blacks (83,942) as slaves (87,189) in Maryland, although the latter were much more dominant in southern counties.