Camp Crook is an incorporated small town in Harding County, South Dakota, United States, on the Little Missouri River. Originally named Wickhamville, after one of the original founding families, the town was renamed in April 1883 when the Cheyennes assumed a threatening attitude and their agent called upon the commanding officer of Fort Custer for protection. Major Carrol was dispatched with Troops B, D, and M of the U.S. 1st Cavalry Regiment to the Tongue River Agency, where they established Camp Crook.