The history if the two 13th Texas Cavalry Regiments is confusing.

Col. John H. Burnett's 13th Texas Cavalry Regiment (formery the 13th Texas Mounted Volunteers) can be confused with Col. Edwin Waller's 13th Texas Cavalry Regiment. You may be able to examine the dates and locations and determine where Mr.Blackwell served, died either of disease or action and where he may be buried. I will mention that in the winter of 1861-1862, a disease epidemic took many Confederate soldiers before arriving and during the bivouac at Camp Nelson Arkansas. There are 428 Confederate soldiers buried in unmarked graves at Camp Nelson Confederate Cemetery who died of measeles and camp fever (typhoid fever). My g.g.grandfather was a approved harness and leather goods sutler with the Col. M.F. Locke's 10th Texas Cavalry. He died measles in 1862 and is buried in an unmarked grave at the Camp Nelson Confederate Cemetery.

From August until December 1861, the 13th Texas Mounted Volunteers was mustered and underwent recruit traning in and around Crockett Texas. In January 1862, Col. John H. Burnett was placed in command and the 13th Texas Mounted Volunteers was redesignated the 13th Texas Cavalry Regiment, dismounted. The regiment was sent to Camp Nelson Arkansas. At Camp Nelson, the 13th Texas Cavalry Regiment was combined with Col. Overton C.Young's 12th Texas Infantry, Col. William B.Ochiltree's 18th Texas Infantry, Col. Richard B.Hubbard's 22nd Texas Infantry regiments and Capt. Horace Haldeman's Artillery Battery to form, Col. Overton C.Young 1st Brigade. Col. Young's 1st Brigade was combined with Col. Horace Randal's 2nd Brigade, Col. George M. Flournoy's 3rd Brigade and Col. James Deschler's 4th Brigade to form the Brig.Gen. Henry E. McCulloch's 1st Texas Division, Second Corps, Army of the Trans-Mississippi Department. On January 1,1863, Maj. Gen. John G. Walker assumed command and it became known as Walker's Texas Division for the remainder of the war. Walker's Texas Division subsequently saw action at Manfield on April 8, 1864, Pleasant Hill on April 9, 1864 and Jenkins Ferry on April 30, 1864 during the Red River Campaign.

Lt. Col. Edwin Waller's 13th Texas Cavalry Battalion was mustered in and around Brenham, Texas from August to December 1861 and was moved to Hempstead, Texas in January 1862. Lt. Col. Waller's 13th Texas Cavalry Battalion left Hempstead for Louisiana on July 4, 1862. In S.W. Louisiana the battalion performed partisan activities until the spring of 1863, when Waller's 13th Texas Cavalry Battalion was attached to Col. Thomas Green's Brigade which recently arrived from New Mexico. Lt.Col.Waller's 13th Texas Cavalry Battalion saw action with Brig.Gen.Thomas Green's Brigade during the Red River Campaign at Mansfield and Pleasant Hill. In December 1864, Lt.Col.Waller was promoted to colonel and the 13th Texas Cavalry Battalion was raised to regimental status and was known as the 13th Texas Cavalry Regiment for the remainer of the war.