Anthony bm.  Colquitt began his Confederate service as a captain but was quickly elected colonel of the Sixth Georgia Infantry in May 1861. After service in defense of Richmond, Virginia, during the spring and summer of 1862, he was appointed brigadier general on September 1, 1862. Colquitt commanded a brigade of Georgians throughout most of the battles in the eastern theater, from Antietam in Maryland in September 1862 through Chancellorsville, Virginia, in May 1863. Colquitt’s service in Robert E. Lee’s Army of Northern Virginia garnered him the sobriquet “the rock of South Mountain” because his brigade stalwartly repelled an attack from the Union army at South Mountain in Maryland on September 14, 1862. After unsatisfactory service during Thomas “Stonewall” Jackson’s famous flank attack on the Union army at Chancellorsville, Colquitt was sent first to North Carolina and ultimately to South Carolina for much of 1863 and 1864. He participated in the defense of Charleston, South Carolina, during the long siege of that city.