the 11th Infantry and arrived at Fort Sill on June 10. On June 27, 1874, more than 200 indigenous warriors attacked a group of buffalo hunters camped at Adobe Walls, beginning the Red River War. In response, Augur ordered Mackenzie and the 4th Cavalry back to Fort Concho in July. By August, Sheridan, now commanding the Military Division of the Missouri, ordered five expeditionary forces of more than 3,000 soldiers each into the South Plains. The southern force, under Mackenzie, left Fort Concho on August 23, 1874, with eight companies of the 4th Cavalry, four of the 10th Infantry, and one from the 11th Infantry. Over the following year, Mackenzie chased the Comanche to their base of operations in the Palo Duro Canyon and destroyed it on September 28. His force continued to patrol the area over the winter, preventing the Comanche from rebuilding their supplies and forcing their return to their reservation. Base of the 10th Cavalry By 1875, Fort Concho had become one of the main US Army bases in Texas, but early in the year, the 4th Cavalry was transferred to Fort Sill to keep the South Plains nations on their reservation. They were replaced at Fort Concho by the 10th Cavalry, an all-black regiment commanded by Colonel Benjamin Grierson. He arrived at Fort Concho on April 17, 1875, and established the regimental headquarters there. Stationed at Forts Concho, Stockton, Davis, Quitman, and Clark, and their subposts, the 10th Cavalry was tasked with patrolling the frontier, escorting wagons and settlers, and mounting expeditions. Beginning in 1877, starving Plains tribes began killing buffalo hunters and raiding white settlements. In response, Grierson sent Captain Nicholas M. Nolan and a company of the 10th to subdue the raiders. Nolan set out in July, and achieved nothing but the death of four soldiers from the 10th Cavalry's Company A. In late 1879, Grierson received word that a war party of Ojo Caliente and Mescalero Apache under Chief Victorio entered the Trans-Pecos. He left Fort Concho on March 23, 1880, at the head of five companies of the 10th Cavalry and some of the 25th Infantry to disarm the Mescaleros of the Fort Stanton reservation. Grierson's soldiers fought with Apache raiders over early April, then reached Fort Stanton on April 12. The disarmament was delayed until April 16 because of rains and resulted in failure when the Mescalero Apache escaped with most