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.
Shows the progression of earthworks constructed to allow Union forces to approach Fort Wagner. Gillmore's troops reached the ditch surrounding the fort on September 6. The Confederate forces abandoned the fort during the night.