Monrovia (Md.)--History--19th century]]> Maryland--History--Civil War, 1861-1865]]> Maryland--Frederick--Monrovia]]> Monocacy River (Md.)]]> Maryland--History--Civil War, 1861-1865]]> Monocacy River]]> Maryland--Frederick]]> Virginia--History--Civil War, 1861-1865]]> Dranesville (Va.)--History--19th century]]> United States--Army--Pennsylvania Light Artillery Regiment, 1st]]> Virginia]]> Fort Jackson (La.)--History--Siege, 1862]]> Louisiana--History--Civil War, 1861-1865]]> Louisiana--Plaquemines parish--Fort Jackson]]> United States--History--Civil War, 1861-1865]]> Ordnance--United States]]> Fortification--United States]]>