After a gun demonstration at a swanky event turned deadly, the US Navy had no interest in revisiting the production of large shell guns. But when John A.B. Dahlgren, known as the “Father of Naval Ordinance,” developed a new style of naval shell gun known as the Dahlgren gun, these weapons would eventually be mounted onto Monitor and taken into battle against CSS Virginia.

The Confederate ironclad that fought in Hampton Roads on March 8-9, 1862 had a mixed armament of shell guns, rifled guns, hot shot guns, howitzers, and a ram. This ship was designed to destroy Union wooden warships using these weapons, and successfully did so on March 8. Confederate Secretary of the Navy Stephen Russell Mallory and Naval Scientist Lieutenant John Mercer Brooke were two of the masterminds behind the outfitting of the well-equipped ironclad. 

Just hours away from reinforcing Ft. Sumter and hours away from saving Gosport Navy Yard, USS Pawnee eventually became a valuable blockader. This steam screw gunboat was involved in several major operations with the Atlantic Blockading Squadron, North Atlantic Blockading Squadron, and South Atlantic Blockading Squadron until the war’s end.