During the 1870s, when the Native Americans of the Great Plains were fighting the United States, the Hunkpapa were led by Sitting Bull in the fighting, together with the Oglala Lakota. They were among the last of the tribes to go to the reservations. By 1891, the majority of Hunkpapa Lakota, about 571 people, resided in the Standing Rock Indian Reservation of North and South Dakota. Since then they have not been counted separately from the rest of the Lakota.