CSS Tennessee was a casemate ironclad ram built for the Confederate Navy during the American Civil War. She served as the flagship of Admiral Franklin Buchanan, commander of the Mobile Squadron, after her commissioning. She was captured in 1864 by the Union Navy during the Battle of Mobile Bay and then participated in the Union's subsequent Siege of Fort Morgan. Tennessee was decommissioned after the war and sold in 1867 for scrap.
USS Tennessee in 1865
Lieutenant (later Commander) James D. Johnston, CSN, commander of CSS Tennessee
The casemate ironclad was a type of iron or iron-armored gunboat briefly used in the American Civil War by both the Confederate States Navy and the Union Navy. Unlike a monitor-type ironclad which carried its armament encased in a separate armored gun deck/turret, it exhibited a single casemate structure, or armored citadel, on the main deck housing the entire gun battery. As the guns were carried on the top of the ship yet still fired through fixed gunports, the casemate ironclad is seen as an intermediate stage between the traditional broadside frigate and modern warships.
CSS Palmetto State, the archetypal casemate ironclad. Note the sloped deck and the low waterline.
Detail of the remains of USS Cairo as a museum ship today. The sloped casemate deck is clearly visible.
Casemate Ironclad USS Cairo on a contemporary photograph.
