General George Crook was one of the most prominent soldiers in the frontier West. General William T. Sherman called him the greatest Indian fighter and manager the army ever had. And yet, on hearing of Crook's death, the Sioux chief Red Cloud lamented, "He, at least, never lied to us." As a young officer in the Pacific Northwest, Crook emphasized training and marksmanship--innovative ideas in the antebellum army. Crook's career in the West...