HDQRS. DEPT. OF THE MISSISSIPPI,
Saint Louis, March 13, 1862.
I. In compliance with the orders of the President of the United States the undersigned hereby assumes command of the Department of the Mississippi, which includes the present Department of Kansas and the Missouri and the Department of the Ohio and country west of a north and south line drawn through Knoxville, Tenn., and east of the western boundaries of the States of Missouri and Arkansas. Headquarters of the Department of the Mississippi will remain, until further orders, at Saint Louis, Mo.
II. Commanding officers not in the Department of the Missouri will immediately report to these headquarters the strength and positions of their several commands.
H. W. HALLECK,
SOURCE: The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Series 1, vol. 8, p. 611