Clement H . Stevens Clement Hoffman Stevens ( August 14 , 1821 – July 25 , 1864 ) was a Confederate States Army brigadier general during the American Civil War ( Civil War ) . He designed and constructed the iron - clad battery on Morris Island at the mouth of Charleston Harbor which was used in the bombardment of Fort Sumter at the outbreak of the Civil War . He was killed in action at the Battle of Peachtree Creek during the Atlanta Campaign . Early life . Clement H . Stevens was born August 14 , 1821 at Norwich , Connecticut . He was the son of a Southern naval officer and his wife who was from South Carolina . They moved the family to Florida when Clement was young and then moved to Pendleton , South Carolina in 1836 . Stevens served several years at sea as secretary to two relatives who were United States Navy officers , Commodore ( later Rear Admiral ) William Shubrick and Commodore William Bee . Stevens married a sister of future Confederate Brigadier Generals Barnard Bee and Hamilton Bee , his cousins . By 1842 , he had become a bank cashier at Charleston , South Carolina . He also became an ordnance expert . In December 1860 , when South Carolina seceded from the Union , Stevens also was a member of a railroad construction company . American Civil War service . Clement H . Stevens became a colonel in the South Carolina Militia before the start of the Civil War . In April 1861 , he became a Confederate States Army colonel and aide - de - camp as the state troops came under the command of the Confederate government . He designed and had constructed an iron - plated battery faced with railroad iron on Morris Island for the attack on Fort Sumter in Charleston Harbor . Stevens became aide - de - camp for his brother - in - law , Brigadier General Barnard Bee , between April 1861 and July 21 , 1861 when Bee was killed in action at the Battle of First Bull Run soon after bestowing the nickname " Stonewall " on then Brigadier General Thomas J . Jackson . Stevens also was wounded in the battle . After he recovered , Stevens took command of a South Carolina militia regiment . On April 1 , 1862 , Stevens was appointed colonel of the 24th South Carolina Infantry Regiment . Stevens fought at and his regiment helped repulse a Union Army attack at the Battle of Secessionville on June 16 , 1862 . He was sent with his regiment to Mississippi and participated in the Vicksburg Campaign in Brigadier General States Rights Gist ' s brigade during General Joseph E . Johnston ' s unsuccessful efforts to relieve the besieged city . Gist praised Stevens as " iron - nerved . " Later with the Army of Tennessee , Stevens was wounded at the Battle of Chickamauga on September 20 , 1863 . His performance elicited praise in after action reports . Clement Hoffman Stevens was promoted to brigadier general , C . S . A . , on January 20 , 1864 . Although not fully recovered from his wounds from Chickamauga , he commanded a brigade in Major General W . H . T . Walker ' s division of I Corps of the Army of Tennessee from February 1864 to July 20 , 1864 . At the Battle of Peachtree Creek during the Atlanta Campaign , on July 20 , 1864 , Stevens was shot in the head and mortally wounded while leading a frontal assault late in the evening . Walker also was killed in action in the fighting at Atlanta two days later , on July 22 , 1864 . Aftermath . Clement H . Stevens died at Atlanta , Georgia , July 25 , 1864 , five days after he was mortally wounded in battle . By the time of his death , Stevens had the nickname of " Rock . " Clement Hoffman Stevens is buried at St . Paul ' s Episcopal Church Cemetery , Pendleton , South Carolina .