Organized in October 1861, the Ninth Texas Cavalry comprised men from Northeast Texas, primarily Tarrant, Grayson, Fannin, Lamar, Hopkins, Titus, Red River, and Cass counties. The regiment was formed in response to a call from the governor for a new cavalry battalion to be formed in North Texas. The commanders of the regiment were Col. William B. Sims, Lt. Col. William Quayle, Lt. Col. Thomas G. Berry, Lt. Col., and later Col. Dudley W. Jones and Lt. Col. James C. Bates.
The regiment saw combat first in Indian Territory in late 1861, including the battles of Round Mountain and Bird Creek. The regiment moved to Arkansas in February 1862. Two companies of the Ninth participated in Lawrence Sullivan "Sul" Ross's raid into Missouri at the end of February 1862. On March 7-8, 1862, the regiment fought on the western wing in the battle of Pea Ridge (Elkhorn Tavern).
In the early spring of 1862, the regiment was dismounted and transferred east of the Mississippi River and entered camp at Corinth, Mississippi. The Ninth found itself involved in several small engagements around Corinth over the next months, including a skirmish at Farmingham on May 9. On September 19, the regiment was present at the battle of Iuka but was not involved in any significant way. The battle of Corinth in October 1862 saw the regiment at the forefront of the assault on the city and in the heavy fighting holding Hatchie Bridge as Gen. Earl Van Dorn's army retreated. In December 1862, the regiment, after being reorganized and remounted, participated in the raid on Holly Springs.
In May 1863 the Ninth joined Joseph Johnston's Army of Relief in the Vicksburg campaign and was involved in almost daily skirmishing during the campaign but no major actions. In the late spring and summer of 1864, the regiment found itself with General Johnston again, fighting Gen. William T. Sherman's advance toward Atlanta, Georgia. Ross's Cavalry Brigade, to which the Ninth Texas belonged, was under fire for 112 consecutive days during this campaign beginning on May 15.
During John Bell Hood's Tennessee campaign, the Ninth saw substantial action, notably at Franklin and Murfreesboro. The regiment was part of Nathan B. Forrest's rearguard as Hood's broken army retreated from Nashville. The early months of 1865 found the regiment near Iuka and Corinth, Mississippi. The regiment was surrendered as part of the Department of Alabama, Mississippi, and eastern Louisiana on May 4, 1865, and the Ninth Texas Cavalry signed paroles on May 15.