*Bozeman Trail. Anglo-American migration route that begins in the northwestern corner of Colorado and extends northwestward, through the panhandle of Nebraska and across Wyoming, bisecting both Crow and Blackfeet settlements on its way toward the town of Bozeman, located at the southern end of Montana’s Gallatin Valley. Although the trail is not mentioned by name in the novel, it is the unstated cause of the increasing numbers of westward settlers during the time period of the novel, traversing Crow and Blackfeet encampments, and is thus central to the white-Indian conflict that builds toward the novel’s conclusion.
*Bighorn River. Largest tributary of the Yellowstone River; rises in west-central Wyoming and joins the Yellowstone in southern Montana. The Little Bighorn River—near which the 1876 battle between the U.S. Cavalry and the Oglala Lakota was fought—separates from the Bighorn River in southeastern Montana in what was historically Crow country, west of Cheyenne settlements and generally south of the various bands of the Blackfeet.
*Fort Benton. Seat of Chouteau County in north-central Montana on the Big Missouri River, which allowed the town to develop into a regional steamboat port. The town experienced boom times due to gold-seekers and cattlemen who used the town as a supply port.
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