Sitting Bull Hills for gold and to determine a suitable location for a military fort in the Hills. Custer's announcement of gold in the Black Hills triggered the Black Hills Gold Rush. Tensions increased between the Lakota and whites seeking to move into the Black Hills. Although Sitting Bull did not attack Custer's expedition in 1874, the US government was increasingly pressured by citizens to open the Black Hills to mining and settlement. Failing in an attempt to negotiate a purchase or lease of the Hills, the government in Washington had to find a way around the promise to protect the Sioux
Sitting Bull response to poor treatment by the government and in an effort to drive the whites away. Despite being embroiled in the American Civil War, the United States Army retaliated in 1863 and 1864, even against bands which had not been involved in the hostilities. In 1864, two brigades of about 2200 soldiers under Brigadier General Alfred Sully attacked a village. The defenders were led by Sitting Bull, Gall and Inkpaduta. The Lakota and Dakota were driven out, but skirmishing continued into August. In September, Sitting Bull and about one hundred Hunkpapa Lakota encountered a small party near what is now