Lieutenant-General Daniel Harvey Hill (July 12, 1821 – September 24, 1889), commonly known as D. H. Hill, was a senior officer of the Confederate States Army who commanded infantry in the eastern and western theaters of the American Civil War. Hill was known as an aggressive leader, being severely strict, deeply religious and having dry, sarcastic humor. He was brother-in-law to Stonewall Jackson, a close friend to both James Longstreet and Joseph E. Johnston, but disagreements with both Robert E. Lee and Braxton Bragg cost him favor with Confederate President Jefferson Davis. Although his military ability was well respected, Hill was underutilized by the end of the American Civil War on account of these political feuds. Early life and education Daniel Harvey Hill was born at Hill's Iron Works, in York District, South Carolina to Solomon and Nancy Cabeen Hill. His paternal grandfather, William "Billy" Hill, was a native of Ireland who had an iron foundry in York District where he made cannon for the Continental Army. His maternal grandfather was a native of Scotland. Hill graduated from the United States Military Academy in 1842, ranking 28 out of 56 cadets, and was appointed to the 1st United States Artillery as a brevet 2nd Lieutenant. He was transferred to the 3rd Artillery on 20 October 1843. Hill was promoted to 2nd Lt. On 13 Oct 1845 in the 4th Artillery Regt. He was promoted to 1st Lt on 3 March 1847. As his regiment served as infantry, he distinguished himself in the Mexican–American War, being brevetted to captain for bravery at the Battle of Contreras and Churubusco, and brevetted to major for bravery at the Battle of Chapultepec. Among the people enslaved by the Hill family during Daniel Harvey's youth was Elias Hill. Daniel Harvey helped teach him to read and write. As a freedman after the war, Hill became a preacher and led his congregation in emigrating to Liberia after the Ku Klux Klan terrorized his neighborhood. In February 1849, Daniel Harvey Hill resigned his commission and became a professor of mathematics at Washington College (now Washington and Lee University), in Lexington, Virginia. While living in Lexington, he wrote a college textbook for the Southern United States market, Elements of Algebra, which "with quiet, sardonic humor, points a finger of ridicule or scorn at any and everything Northern." While not all of the textbook's questions were "anti-Yankee", many were,