Sitting Bull did not agree to the treaty. He told the Jesuit missionary, Pierre Jean De Smet, who sought him out on behalf of the government: "I wish all to know that I do not propose to sell any part of my country." He continued his hit-and-run attacks on forts in the upper Missouri area throughout the late 1860s and early 1870s. The events of 1866–1868 mark a historically debated period of Sitting Bull's life. According to historian Stanley Vestal, who conducted interviews with surviving Hunkpapa in 1930, Sitting Bull was made "Supreme Chief of the whole Sioux Nation" at this time.
Oklahoma Tax Commission v. Citizen Band, Potawatomi Indian Tribe of Oklahoma and as such qualifies for immunity. The court then held that the Tenth Circuit erred in holding that tribe did not have to collect sales taxes on cigarettes sold to non-members. Justice Stevens issued a concurring opinion that mainly discussed the question of immunity as applied to the facts of the case. Oklahoma Tax Commission v. Citizen Band, Potawatomi Indian Tribe of Oklahoma Okla. Tax Commission v. Citizen Band, Potawatomi Indian Tribe of Okla., 498 U.S. 505 (1991), was a case in which the Supreme Court of the United States held that the tribe was not subject to state sales