Well, from the CWSS website comes this:

Terry's Cavalry Regiment was assembled in Montgomery County, Texas, during the spring of 1864. Attached to the Trans-Mississippi, the unit was ordered to Calcasieu Pass, Louisiana, then was active in numerous conflicts in Arkansas. Later it moved to Texas and was placed on commissary duty and disbanded in the spring of 1865. Its commanders were Colonel David S. Terry, Lieutenant Colonel S. H. Brooks, Major J. M. Evans.

I believe this is taken from Joseph Crute's Units of the Confederate States Army.