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
5th Cavalry Regiment the yellow field on the lower half of the crest. On 9 April 1865, the 5th Cavalry was selected to serve as the Union Honor Guard for the surrender of the Confederate Army of Northern Virginia at Appomattox Courthouse. The Regiment stood by solemnly as it watched its former commander, General Robert E. Lee, surrender to the Union Army. In September 1868, the 5th Cavalry Regiment received its orders and began preparations for duty against hostile Indians in Kansas and Nebraska. In the following years the 5th Cavalry fought many skirmishes and battles against the Sioux, Cheyenne and Arapaho on