July 16, 1862
On July 16, 1862, Major General Henry W. Halleck expanded the District of West Tennessee commanded by Major General Ulysses S. Grant.
Special Field Orders, No. 161
HDQRS. DEPT. OF THE MISSISSIPPI,
Corinth, Miss., July 16, 1862
I. Brigadier-General McKean is assigned to the command of paroled prisoners at Benton Barracks, Saint Louis.
II. The District of West Tennessee, Major-General Grant commanding, will include the Districts of Cairo and Mississippi; that part of the State of Mississippi occupied by our troops, and that part of Alabama which may be occupied by the troops of his particular command, including the forces heretofore known as the Army of the Mississippi.
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By order of Major-General Halleck:
N. H. McLEAN,