The 95,000 men of military age in Civil War Texas, unaccustomed to walking, preferred the daring and mobility of the cavalry used to scout the enemy, screen troop movements and make lightning attacks. 58,533 Texans joined it, riding their own horses or ones donated by citizens' groups. Many of Texas' 325,000 horses were sent to other states. Yet footsoldiers were needed, too. The state set up camps of instruction, to teach Texans to walk and fight. By mid-1862 the need for infantry was so great that the following units were unhorsed under strong protest: 6th Texas Cavalry Battalion, 13th, 16th, 18th, 22nd, 24th, 25th and 28th Texas Cavalry regiments. On Aug. 15, 1863, a part of A. W. Terrell's Cavalry regiment at Richmond was ordered to dismount and march to the defense of Galveston. On Sept. 11, an order to dismount still more men caused mutiny, and 91 rode their prized horses north to homes on the Indian frontier or to join other cavalry units. When 25 were tried later, only the officers were punished. Enlisted men returned to the regiment, and fought in such actions as the 1864 Red River campaign to prevent a Federal invasion of Texas.