Sitting Bull was born in 1831 and became chief and medicine man of the Hunkpapa Lakota Sioux. He was best known for his unification of the Sioux tribes in the Great Plains in the …Sitting Bull was born in 1831 and became chief and medicine man of the Hunkpapa Lakota Sioux. He was best known for his unification of the Sioux tribes in the Great Plains in the …