From 1778 to 1871, approximately 370 treaties with Native Americans were ratified by the United States. The Treaty of Fort Laramie—in which the Sioux agreed to settle within the Black Hills reservation in the Dakota Territory—was established in the spring of 1868 at Fort Laramie, in the Wyoming Territory. Yellow Hawk was one of signers of the treaty guaranteeing to the Lakota ownership of the Black Hills, and further land and hunting rights in South Dakota, Wyoming, and Montana.