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.
Sitting Bull the Lakota language means "Buffalo Bull Who Sits Down", would later be abbreviated to "Sitting Bull". Thereafter, Sitting Bull's father was known as Jumping Bull. At this ceremony before the entire band, Sitting Bull's father presented his son with an eagle feather to wear in his hair, a warrior's horse, and a hardened buffalo hide shield to mark his son's passage into manhood as a Lakota warrior. During the Dakota War of 1862, in which Sitting Bull's people were not involved, several bands of eastern Dakota people killed an estimated 300 to 800 settlers and soldiers in south-central Minnesota in