Four Bears, Native American warrior chief puzzle

The image in this puzzle comes from a James Ayers original painting, Mato Tope, Four Bears (2010, Mandan tribe). Mato-Tope (Circa 1795-1837) was a Mandan chief. He was also called “Four Bears”, after a battle where a group of Assiniboin said he came on in a charge like “four bears.” Mato-Tope was widely known as a brave warrior, and was famous for killing a Cheyenne chief in hand-to-hand combat. More information about this painting and the artist, James Ayers, available on the artist's website: http://jamesayers.com/2010/09/06/mato-tope-four-bears/