By the time the 1830’s the government had forced the native tribes to move to the great plains . White settlers believed that the land they were on was to dry for planting crops , this is why the Treaty of fort laramie was put into place in 1851 not many agreed to it but they had no choice . In 1864 the Sand Creek Massacre happened when the militia set fire on a peaceful village , later the tribes responded with attacks on soldiers and settlements these attacks is the result of the Second Treaty of Fort Laramie . In 1874 people discovered that there was gold in the Black Hills of South Dakota miners came flooding into the Siouxland , Sitting Bull,Crazy horse and Two Sioux chiefs but then they later united to push back the intruders
