Subject(s): United States. -- Army -- African American troops -- History -- 19th century | African Americans -- West (U.S.) -- History -- 19th century | African American soldiers -- West (U.S.) -- History -- 19th century | Frontier and pioneer life -- West (U.S.) | Indians of North America -- Wars -- 1866-1895 | West (U.S.) -- History -- 19th century | West (U.S.) -- History -- 1860-1890.