Why are Sitting Bull or Chief Joseph important parts of US History? (what do they represent, why are they important symbols, or stories to learn from?)

Sitting Bull was the political and spiritual leader of the Sioux warriors who destroyed General George Armstrong Custer's force in the famous battle of Little Big Horn. Years later he joined Buffalo Bill Cody's Wild West show.

Chief Joseph was a Nez Perce leader who led his tribe called the Wallowa band of Nez Perce through a treacherous time in United States history. These indigenous people were natives to the Wallowa Valley in Oregon. Chief Joseph was a powerful advocate for his people's rights to remain on their homeland.