Jan 31 1863. I have issued General Orders Number 13, announcing that I am taking command of the Vicksburg expedition.
GENERAL ORDERS, Number 13. HDQRS. DEPT. OF THE TENNESSEE, In Field, Young’s Point, La., January 30, 1863.
I. Major General U. S. Grant, commanding Department of the Tennessee, hereby assumes the immediate command of the expedition against Vicksburg, and department headquarters will hereafter be with the expedition.
II. Army corps commanders will resume the immediate command of their respective corps, and will report to and receive orders direct from these headquarters.
III. As army corps to be effective should be complete in their organization, and ready at all times for any move they may be called on to make, without looking to department or other headquarters for anything more than the replenishing of their supplies, no changes of transfers will be made by department orders, unless absolutely necessary for the interest of the service.
IV. The Thirteenth Army Corps, Major General J. A. McClernand commanding, is charged with garrisoning the post of Helena, Ark., and any other point on the WEST bank of the river it may be necessary to hold south of that place.
By order of Major General U. S. Grant:
J A. RAWLINGS,
The Papers of Ulysses S Grant, Vol 7, p 265
O.R., I, xxiv, part 1, 11