In July 1863, Col.Peter C. Hardeman reorganized the 1st Texas Cavalry at the Warren Supply Depot in Fannin County and the designation Arizona Brigade was not used. It was previously used to distinguish the 1st Texas Cavalry from other units with the same number and with plans to return to New Mexico Territory.

July 1863
Warren Supply Depot, Fannin County Texas
Regiment reorganized by Lt.Col. Peter C.Hardeman using recruits from disbanded militia companies. Short two companies and other companies deficient. Capt.J.H. Damron's Company, 100 effectives (Co.C) detached for patrol duty on Texas Road in Indian Territory as far north as old Fort McCulloch, the Muddy Boggy River and Rocky Creek on Fort Smith (old Butterfield Road)Road in present day Atoka County,OK. In November 1863, Capt.Damron's Company is combined with Quantrill's irregulars and rendezvous with Hardeman's Texas Cavalry Regiment at Camp Hardeman, Doaksville,I.T.

Nov. 1, 1863
Doaksville, (Camp Hardeman) Indian Territory
Col.P.C.Hardeman's Texas Cavalry Regiment
Headquarters
Dept.of Indian Territory
Brig.Gen. William Steele,commanding

March 1864
Camden Expedition, Ark.

April 1864
Consolidated with Col.R.M.Gano's Squadron to form Gano's Brigade
Maj.Gen.S.B.Maxey's Cavalry Division
District of Arkansas

April 1864
Battle of Poison Springs,Ark.
Maj.Michael Looscan commanding a detachment of Col.Hardeman's Regiment

July 1864
Battle of Massards Prairie, Ark.
Maj.M. Looscan commanding a detachment of Col.Hardeman's Regiment.
Remainder of Gano's Brigade deployed on Ft.Smith - Doaksville Road to ambush a Federal pursuit. No Federal pursuit was organized.

September 1864
Battle of Cabin Creek,I.T.
Moved 400 miles in 14 days from Winding Stair Mountains to Cabin Creek,I.T. north of Fort Gibson.
Col. Hardeman's 31st Texas Cavalry Regiment*
Col. Gano's 5th Texas Cavalry Brigade
Dept.of Indian Territory
Brig.Gen.Cooper,commanding

February 1865
Hempstead,Texas
Col.P.C. Hardeman's 31st Texas Cavalry Regiment*
*No official recognition to this regiment was given. Another regiment having been designated as 31st Texas Cavalry (Hawpe's)
Dismounted by Maj.Gen. J.A. Wharton
Prepared for coastal defense

March 1865
Hempstead,Texas
Col.P.C.Hardeman's Texas Volunteer Regiment
Brig.Gen. James E. Harrison's Brigade
Maj.Gen. S.B.Maxey's Infantry Division
Trans-Mississippi Dept.

May 26,1865
Trans-Mississippi Dept.
Surrendered