SPECIAL ORDERS, No. 164.
HEADQUARTERS DEPARTMENT OF THE TENNESSEE,
Near Vicksburg, Miss., June 18, 1863.
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IV. Major-General McClernand is hereby relieved from the command of the Thirteenth Army Corps. He will proceed to any point he may select in the State of Illinois, and report by letter to Headquarters of the Army for orders. Maj. Gen. E. O. C. Ord is hereby appointed to the command of the Thirteenth Army Corps, subject to the approval of the President, and will immediately assume charge of the same.
By order of Major-General Grant:
JNO. A. RAWLINS,
SOURCE: The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Series I, Volume 24, Part 1 (Serial No. 36), p. 103