During Grierson's raid, this unit was an unattached cavalry command of Lt. Gen. John C. Pemberton's Department of Mississippi and East Louisiana. Ranging through Claiborne, Jefferson, and Adams Counties, the regiment participated in the pursuit of Grierson's cavalry troops. At the battle of Champion Hill, the regiment was attached to Brig. Gen. John S. Bowen's Division, of Lt. Gen. John C. Pemberton's Army of Vicksburg, and during the siege of Vicksburg, was attached to Brig. Gen. George B. Cosby's 1st Brigade, of Brig. Gen. William H. (Red) Jackson's Cavalry Division, Gen. Joseph E. Johnston's Army of Relief, Department of the West, and commanded by Col. Wirt Adams. [Refer to Edwin Bearss' The Vicksburg Campaign, Volume I, page 225; Volume II, pages 251 and 645; and Volume III, page 1152.]
Gen. Jackson's division was ordered from the Department of Tennessee about 26 May 1863, and headquartered near Canton, MS, on 4 June 1863, and at Vernon, MS, on 13, 18, 21, and 23 June 1863.
Wirt Adams' Mississippi Cavalry