John C. Pemberton

Confederate lieutenant general; commanded the Army of Mississippi at the Siege of Vicksburg.

from Oct 14, 1862 Department of Mississippi and East Louisiana Lieutenant general Commander; department command dates not separately verified. October 14, 1862 is the date Pemberton took command of the Army of Vicksburg, and his command after the fall of Vicksburg was not established
Oct 14, 1862 – Jul 4, 1863 Army of Vicksburg Lieutenant general Commander