4th Cavalry Regiment (United States) companies of the 4th Cavalry to Fort Clark. This time Mackenzie led a larger and more extensive expedition into Mexico, restored a system of patrols, and reestablished peace in the devastated region of South Texas. Outside Texas, Mackenzie and the 4th Cavalry administered and controlled the Kiowa-Comanche and the Cheyenne-Arapaho reservations for several years, and, after the defeat of George Armstrong Custer's command at the Battle of Little Bighorn in June 1876, forced Crazy Horse and his band of Sioux and the Northern Cheyennes to surrender. In the autumn of 1879, Mackenzie with six companies of the 4th Cavalry subdued
Boston Custer ("Tom"), became military officers in the Union Army during the American Civil War. Boston had been unable to officially join the Army due to poor health. A civilian contractor, Custer served as forage master for his brother George's U.S. 7th Cavalry Regiment in the 1874 Black Hills expedition. He was employed as a guide, forager, packer and scout for the regiment for the 1876 expedition against the Lakota Indians. On June 25, 1876, along with his 18-year-old nephew Henry Armstrong "Autie" Reed, Custer was with the pack train at the rear of Lt. Col. George Custer's troops. Hearing from a