LAZELLE, Henry Martyn, soldier, born in Enfield, Massachusetts, 8 September, 1832. He was graduated at the United States military academy in 1855, assigned to the infantry, served on the frontiers of Texas and New Mexico against the Apaches, and in February, 1859, was severely wounded in a skirmish with the latter in the Sacramento mountains. While stationed at Fort Bliss, Texas, he was captured by the Confederates on 8 May, 1861, and held as a prisoner of war until he was exchanged on 28 July, 1862. He was promoted captain on 11 June, 1861, and served in 1862-'3 as assistant commissary of prisoners at Washington, D. C., and in August, 1862, was agent for the exchange of prisoners of war in the west. He was appointed colonel of the 16th New York cavalry on 23 October, 1863, commanded that regiment in operations against Mosby's guerillas, and was afterward placed in command of a cavalry brigade, he was brevetted major in the regular army on 19 September, 1864, for gallantry in the action near Culpeper, Virginia, resigned his volunteer commission on 19 October, 1863, and served subsequently as provost-marshal-general of the military division of west Mississippi. He took part in the Yellowstone expedition against the Sioux Indians in 1872, being engaged in the action on Powder river, Dakota; also in the Yellowstone expedition of the autumn of 1873, and in the operations against the Sioux in 1874, and was promoted major on 15 December, 1874. In 1877 he served in the field against the Indians in Montana. He was commandant of cadets at the United States military academy in 1879-'82, was promoted lieutenant-colonel on 26 June, 1882, represented the United States at the military manoeuvres in India in 1885, and served as assistant inspector-general of the department of the Columbia till June, 1887, when he was placed in charge of the bureau of publication of war records at Washington, D. C., succeeding Colonel Robert N. Scott. Lieutenant-Colonel Lazelle has contributed to various magazines, and has published "One Law in Nature" (New York, 1872), and a prize essay on "Improvements in the Art of War" (1882).