From there two companies of the 18th advanced 91 miles to the northwest, where on August 13, they established a third post, Fort C. F. Smith on the Bighorn River.
De acolo, două companii a celui de-al 18-lea Regiment a avansat 146 km. nord-vest unde, pe 13 august, au întemeiat cel de-al treilea post, Fortul C. F. Smith pe râul Bighorn.