I found this at http://www.itd.nps.gov/cwss/soldiers.cfm I hope it helps.

Warner A. Guy (First_Last)
Regiment Name 3 Virginia Cavalry
Side Confederate
Company D
Soldier's Rank_In Corporal
Soldier's Rank_Out Corporal
Alternate Name
Notes
Film Number M382 roll 23

and this

3rd Regiment, Virginia Cavalry

3rd Cavalry Regiment was organized with independent companies and entered Confederate service on July 1, 1861. The regiment was formed with eleven companies, later reduced to ten. It was also called 2nd Regiment until October. Its members were raised in the counties of Mecklenburg, Elizabeth City, New Kent, Halifax, Nottoway, Cumberland, Dinwiddie, and Prince Edward. For a time six companies served in the Department of the Peninsula and four in the Valley District. Later the unit was assigned to General F. Lee's, Wickham's, and Munford's Brigade, Army of Northern Virginia. It fought in many conflicts from Williamsburg to Fredericksburg, then was involved in the engagements at Kelly's Ford, Chancellorsville, Brandy Station, Upperville, Gettysburg, Bristoe, Mine Run, The Wilderness, Todd's Tavern, Spotsylvania, Haw's Shop, and Cold Harbor. The 3rd went on to participate in Early's operations in the Shenandoah Valley and the Appomattox Campaign. It took 210 effectives to Gettysburg, but only 3 surrendered on April 9, 1865. Its commanders were Colonels Thomas F. Goode, Robert Johnston, and Thomas H. Owen; Lieutenant Colonels William R. Carter, William M. Feild, and John T. Thornton; and Majors Henry Carrington and Jefferson C. Phillips.