Moving Robe Woman (Tȟašína Máni) — The Hunkpapa Lakota Woman Who Rode Into The Battle Of Little Bighorn After Learning Her Brother Had Been Killed
Rather than enforcing the treaty and removing the miners, the government attempted to purchase the Black Hills.
When the Lakota refused, the government effectively declared the treaty void by issuing the January 1876 ultimatum requiring all Lakota to report to reservations.
The Battle of Little Bighorn was, from the Lakota perspective, a battle fought in defense of treaty rights — in defense of lands that the United States government had explicitly promised to protect and had then explicitly moved to seize.
This political context is essential for understanding why Moving Robe Woman and the thousands of people in that camp on the Greasy Grass were there, and why they fought the way they did.