Civil War heavy explosive ordnance

["Projectiles" "Equipment and supplies" "History" "Mines (Military explosives)" "Submarine mines" "American history: c 1800 to c 1900" "Ordnance weapons technology" "Weapons & equipment" "c 1800 to c 1900" "Military Science" "History - Military / War" "Military" "USA" "Military - General" "19th century" "Confederate States of America" "United States" "United states history civil war 1861-1865 equipment and supplies"]