Genl. Q. A. Gillmore's line of earthworks in front of Fort Wagner, Morris Island, S.C., July 1863

Map depicts the siege of Fort Wagner, Morris Island, Charleston Harbor, S.C. Details include the locations of swamps, marshes, and sand ridges, and the elaborate earthworks and trenches constructed by Union troops under Gen. Q. A. Gillmore as they prepared to lay siege to the fort.