Ten percent, not seventy-five.

Congress enacted this “agreement” into law on February 28, 1877, as the Act of 1877.

The act stripped the Black Hills from the Great Sioux Reservation and transferred them to the United States.

In exchange, the Sioux received continued subsistence rations — the same rations that had been threatened with termination if they did not sign — along with a vague promise of future support.

The Black Hills, with their gold and timber and their profound significance to the Lakota people, were now legally the property of the United States.

The Sioux had not sold them.