Everything you need to understand or teach Crazy Horse and Custer by Stephen Ambrose.
This is a remarkable book about two of the country's best warriors. The circumstances of their lives led them to be working on opposing sides of a conflict. The author describes both following the dictum of divining what makes someone successful in their roles, more so than taking a political stake in one side and demonizing the opposition. Realistically, this is easier to do now that so much time has passed...
Crazy Horse and Custer: The Parallel Lives of Two American Warriors Lesson Plans contain 115 pages of teaching material, including: