RENO, Jesse Lee (re-no'), soldier, born in Wheeling, West Virginia, 20 June, 1823; died on South Mountain, Maryland, 14 September, 1862. He was appointed a cadet in the United States military academy from Pennsylvania, where he was graduated in 1846, and at once promoted brevet 2d lieutenant of ordnance. He served in the war with Mexico, taking part in the battles of Cerro Gordo, Contreras, Chumbusco, and Chapultepee, and in the siege of Vera Cruz. He was commissioned 2d lieutenant, 3 March, 1847, brevetted 1st lieutenant, 18 April, for gallant conduct in the first-named engagement, and captain, 13 September, for bravery at Chapultepee, where he commanded a howitzer battery, and was severely wounded. He was assistant professor of mathematics at the military academy from January till July, 1849, secretary of a board to prepare a "system of instruction for heavy artillery in 1849-50, assistant to the ordnance bored at Washington arsenal, D. C. in 1851-'3, and on topographical duty in Minnesota in 1853-'4. He was chief of ordnance in the Utah expedition in 1857-'9, and in command of Mount Vernon arsenal, Alabama, from 1859 until its seizure by the Confederates in January, 1861. On 1 July, 1860, he was promoted captain for fourteen years' continuous service. From 2 February till 6 December, 1861, he was in charge of the arsenal at Leavenworth, Kansas After being made brigadier-general of volunteers, 12 November, 1861, he was in command of the 2d brigade during General Ambrose E. Burnside's expedition into North Carolina, being engaged in the capture of Roanoke island, where he led an attack against Fort Bartow, and the battles of New Berne and Camden. From April till August, 1862, he was in command of a division in the Department of North Carolina, and on 18 July he was commissioned major-general of volunteers. In the campaign in northern Virginia, in the following month, he was at the head of the 9th army corps, and took part under General John Pope in the battles of Manassas and Chantilly. Still at the head of the 9th corps, Gem Reno was in the advance at the battle of South Mountain, where he was conspicuous for his gallantry and activity during the entire clay. Early in the evening he was killed while leading an assault.