Chief Tatanka-Iyotanka (aka Sitting Bull). Born: Jumping Badger 1831 in Grand River, Dakota Territory. Died: December 15, 1890 in Grand River, South Dakota, Standing Rock Indian Reservation. Nationality: Lakota (Sioux). Sitting Bull was a Hunkpapa Lakota military, religious, and tribal chief who led his people through many years of resistance to government policies in the United States. He was a stalwart defender of his people’s land and ways of life which were threatened by white settlers.