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 Crystal Caverns the caverns with a friend, Black Elk, who chose the name of the caverns in honor of his friend Sitting Bull. Black Elk held the show for over a decade from 1934 to educate people about Lakota culture. In 1992, Bud received the Ben Black Elk Award for "promotion of Native American culture." When he was 93 he retired and passed operations of the cave to his grandson, Peter Heffron. In 2015, remaining family members decided that they no longer wanted to operate the business, and the cave was closed to the public. At that time, the cave and about