"Field artillery in the American Civil War" . "12-pounder mountain howitzer" . "M1857 Napoleon Gun" . "ordnance testing" . . "3-inch ordnance rifles" . . . "artillery location" . "shrapnel" . . . "field artillery" . "Artillery" . "24-pounder F. D. howitzer (smooth)" . . "12-pounder field guns (smooth)" . . "Napoleons" . "1857 Napoleon" . . . . "rifled gun" . "10-pound Parrot rifles" . "6-pounder field gun" . "Civil War-era cannon" . . "United States Artillery" . . "field artillery unit" . . "Union Army artillery organization" . "24-pounder field howitzer" . "Field Artillery of the American Civil War" . . . "12-pounder field howitzers" . . "M1857 Napoleon gun" . "artillery" . "3-inch rifled guns" . "Field artillery" . . "12-pound howitzers" . . . "M1844 32-pounder howitzer" . . . "smoothbore gun" . . . "heavy artillery" . . "CSA Artillery" . "Smoothbore Gun" . . . "rifled guns" . . "light artillery" . . . "smoothbore" . . "8\\\" howitzer" . . . "smoothbore guns" . "M1844 32-pounder howitzers" . "3-inch ordnance rifle" . "6 pounder" . . . "Smoothbore gun" . . "placement of artillery" . "batteries of artillery" . "spherical case" . "24-pound field howitzer" . "12-pounder James guns (rifled)" . "20-pound Parrott rifles" . . "round shrapnel" . . "Whitworth cannons" . . . "12 pound Napoleons" . "3-inch Ordnance rifles" . . "Field Artillery" . . "20-pounder Parrotts (rifled)" . "Rifled Gun" . "cannon" . . . . . . "field service" . "Whitworth rifled breech loader" . . . "Howitzers" . "Rifled gun" . "horse artillery" . . "artillery units" . . . . "Field artillery in the American Civil War" . . "12-pounder howitzer" . . . . "exceptionally accurate weapon" . "6-pounder field guns" . "10-pounder Parrott" . . "type of anti-personnel canister ammunition" . "12-pounder field howitzers (smooth)" . . . . . "Field artillery in the American Civil War#Confederate artillery" . . "Howitzer" . . "32-pounder bronze howitzers" . "howitzer" . "Parrott rifles" . "\\\"field guns\\\"" . "artillery in the Civil War" . "3 inch caliber ordnance rifle" .