Commands.
Assigned, June 25, 1861, to the command of Department No. 2, comprising the defenses of the Mississippi River. March 29, 1862, commanding First Corps, Army of the Mississippi, composed, first, of the divisions of Cheatham and Clark and the detached brigade of Maxey; subsequently, of the divisions of Cheatham and Withers. Commanding Army of the Mississippi, September and October, 1862. Commanding, October and November, 1862, the Armies of Kentucky and Mississippi. Commanding, in _____, 1863, corps in the Army of Tennessee composed of the divisions of Cheatham, Withers and McCown. Commanding, August 31, 1863, the Army of Tennessee (temporarily). In Chickamauga campaign, commanding the right wing of the Army of Tennessee. January 28, 1864, commanding the Department of Alabama, Mississippi and East Louisiana. In May and June, 1864, commanding army in Mississippi co-operating with the army of General Joseph E. Johnston in Northern Georgia.

Polk, Leonidas, born in North Carolina, appointed from North Carolina cadet United States Military Academy, July 1, 1823; graduated eighth in a class of thirty-eight.
Brevet second lieutenant, First Artillery, July 1, 1827.
Resigned December 1, 1827.