The film was based on the book Comanche: Story of America's Most Heroic Horse by David Appel. It tells an imaginary story of the Indian and US Cavalry owners of the horse of the title. It has also been released under the title A Horse Named Comanche.
In Dakota territory in the 1870s, White Bull, a young Sioux, proves his manhood by catching and training a wild colt he names Tonka. When a cruel cousin claims the horse as the privilege of rank, White Bull lets Tonka go. The horse ends up in the hands of a captain in the US cavalry about the time that Sitting Bull gathers the tribes to confront the growing US presence, epitomized by the bigoted General Custer. All paths, including those of White Bull and Tonka, lead to the confluence of the Little and Big Horn rivers.
- Sal Mineo ... White Bull
- Philip Carey ... Captain Myles Keogh
- Jerome Courtland ... Lieutenant Henry Nowlan
- Rafael Campos ... Strong Bear
- H.M. Wynant ... Yellow Bear
- Joy Page ... Prairie Flower
- Britt Lomond ... General George Custer
- Herbert Rudley ... Captain Frederick Benteen
- Sydney Smith ... General Alfred Terry
- John War Eagle ... Chief Sitting Bull
- Gregg Martell ... Corporal Korn
- Slim Pickens ... Ace
- Robert 'Buzz' Henry ... Lieutenant Crittenden