the Eastern Theater of the American Civil War National Battlefields and Military Parks of the United States American Civil War military monuments and memorials American Civil War museums in Maryland Museums in Washington County, Maryland National Park Service areas in Maryland Parks in Washington County, Maryland Journey Through Hallowed Ground National Heritage Area Sharpsburg, Maryland Historic American Buildings Survey in Maryland Historic American Landscapes Survey in Maryland American Civil War on the National Register of Historic Places Historic districts on the National Register of Historic Places in Maryland National Register of Historic Places in Washington County, Maryland Conflict sites on the National Register of Historic Places in Maryland 1890 establishments in Maryland National Battlefield