My great grandfather was in the 1st Texas Cavalry - Arizona Brigade.

The Arizona Brigade was raised in July 1862 for the purpose of recapturing the Territory of the Arizona Territory (which also consisted of the present state of New Mexico) that was lost to the Union following Brig.Gen.Henry Hopkins Sibley's disasterous campaign in New Mexico that ended with his withdrawal from New Mexico with what was left of his Confederate force. When the Arizona Territory fell, some Confederate leaders were willing to abandon it.
Brig. Gen. Sibley reported to President Davis that the Arizona Territory was "not worth a quarter of the blood and treasure which had been expended."

However, on April 14, 1862 John Robert Baylor began to raise a new army with which he would invade and recapture the Arizona Territory for the Confederacy. Baylor was given authority to muster men into service until a brigade was formed. The regiments of the Arizona Brigade were unofficially known as the "Arizona Cavalry Regiments" but most of the men were from Texas. It was called the "Arizona Brigade", yet the brigade never set foot in the Arizona - New Mexico Territory and never fought together as a brigade.

Pursuant to Special Order #81 issued on February 21, 1863, which directed the formation of the Arizona Brigade, consisting of the following regiments:

1st Texas Cavalry Regiment
Col. Peter C. Hardeman
Lt.Col.Edward Riordan
Major Michael Looscan (reassigned to the 31st Texas Cavalry when Col. Trezevant C. Hawpe resigned)
Major Alexander Terrell
The regiment mustered 350 men in Columbus in Colorado County. The regiment was moved by companies to the Warren Supply Depot (Old Fort Warren) in Fannin County to raise troop strength to regimental size. From July 1863 to October 1864, the regiment served in Arkansas and Indian Territory (Oklahoma). Engagements were Poison Springs Arkansas, Massards Prairie Arkansas and 2nd battle of Cabin Creek,I.T. After missing muster at the Warren Supply Depot in June 1864, my great grandfather was transferred to Major James Roberson Diamond's Brush Battalion in Col.James Bourland's Border Regiment and saw no action.

2nd Texas Cavalry Regiment
Col. George Wythe Baylor
Lt.Col.John W.Mullen
Major Sherrod Hunter
The regiment served in Louisiana in the Red River Campaign.

3rd Texas Cavalry Regiment
Col. Joseph Phillips
Lt. Col. George T. Madison
Major Alonzo Ridley
The regiment fought various battles in Louisiana and served in the Red River Campaign.

4th Texas Cavalry Regiment
Col. Spruce McCoy Baird
Lt.Col.Daniel Showalter
The regiment served as a mobile reserve force and was moved where ever it was needed. In September 1863, the regiment engaged hostile Indians in North Texas. In November 1863, the regiment was ordered to San Antonio in order to respond to a Union sea-borne invasion which never materialized. In March 1864, the regiment was placed in Col. John S, Ford "Cavalry of the West" on the Rio Grande. Ford's primary opertions were to secure the routes by which the Confederacy shipped cotton and cattle to South American, Mexican and European markets from northern Mexico. In September 1864 the regiment was reassigned again, this time to the 7th Texas Cavalry Brigade, Drayton's Cavalry Division in Cooke County. By the spring of 1865, the regiment became nothing more than a disorganized mob of mutinous, ill-diciplined riff-raff. Many of those men were pursued and arrested by Col. Bourland's Border Regiment until the end of the war.