 By the terms of the treaty, cession of any part of the reservation required a new treaty executed and signed by at least three fourths of all the adult male Indians occupying the land.The Sioux's right to hunt in some unceded territories were protected by the Fort Laramie Treaty as well.The Fort Laramie Treaty ended the Powder River War of 1866–1867, a series of military engagements in which the Sioux tribes, led by chief Red Cloud, fought to protect the integrity of earlier-recognized treaty lands from the incursion of white settlers.