Following the Civil War, the Cheyenne Indians represented the greatest threat on the Kansas frontier. In late July 1868, Benteen led an expedition to provide security for the Indian agents near Fort Larned. On August 13, Benteen, commanding 30 troopers, encountered a Cheyenne raiding party along the banks of Elk Horn Creek near Fort Zarah. He charged into a force of what appeared to be about fifty warriors. To Benteen's surprise, he next discovered more than 200 Cheyenne raiding a ranch. Benteen pursued the Cheyenne without rest until dark, engaging them throughout the day without respite. This first undisputed victory of the 7th US Cavalry brought Benteen a brevet to colonel and the adoration of the settlers of central Kansas.