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 arrest to take place at dawn on December 15, and advised the use of a light spring wagon to facilitate removal before his followers could rally. Bullhead decided against using the wagon. He intended to have the police officers force Sitting Bull to mount a horse immediately after the arrest. Around 5:30 a.m. on December 15, 39 police officers and four volunteers approached Sitting Bull's house. They surrounded the house, knocked and entered. Lt. Bull Head told Sitting Bull that he was under arrest and led him outside. Sitting Bull and his wife noisily stalled for time, the camp awakened