Texas, in which he continued, with promotion to first lieutenant mounted rifles, until 1858, when he was appointed superintendent of the cavalry school at Carlisle, Pa. From April 15, 1860, until the outbreak of the Confederate war he was assistant adjutant-general, with the rank of brevet captain, in New Mexico. He promptly acted with his State in 1861, and was commissioned captain, corps of cavalry, C. S. A., to date from March 16th. Subsequently he was promoted colonel, was appointed adjutant-general of the army at Manassas, and when Gen. Earl Van Dorn was assigned to command the Trans-Mississippi department, early in 1862, he became his chief of staff and adjutant-general. In his report of the battle of Elkhorn Tavern, General Van Dorn wrote: "Colonel Maury was of invaluable service to me both in preparing for and during the battle. Here, as on other battlefields where I have served with him, he proved to be a zealous patriot and true soldier; cool and calm under all circumstances, he was always ready, either with his sword or pen." Maury was promptly promoted brigadier-general. He accompanied Van Dorn to the consultation with A. S. Johnston and Beauregard at Corinth previous to the battle of Shiloh, and subsequently was transferred with the main Confederate force east of the Mississippi, where his service was afterward given. When Price took command of the army of the West at Tupelo, he commanded one of its two divisions, including the brigades of John C. Moore, W. L. Cabell and C. W. Phifer, and the cavalry of F. C. Armstrong. Little of Maryland, commanding the other division, fell at Iuka, where Maury was held in reserve, and afterward served as rear guard, repelling pursuit. About a fortnight later he commanded the center in the battle of Corinth, against Rosecrans, and gallantly engaged the enemy, who was driven from his intrenchments and through the town. During the subsequent retirement he defended the rear, fighting spiritedly at Hatchie's bridge. He was promoted major-general in November, 1862, and on December 30th, arrived before Vicksburg from Grenada, to support S. D. Lee, who had repulsed Sherman's attack at Chickasaw bayou, and was assigned to command of the right wing. He continued in service here, his troops being engaged at Steele's bayou and in the defeat of the Yazoo Pass expedition, until he was ordered to Knoxville, April 15th, to
