Cuchillo (1978)

After the 14th Ammendment to the US Constitution, everyone has rights - except the Native Americans. Cavalry Army General Boyd applies that by breaking past treaties with the Apaches, and suppressing them in the territory under his command. A young Apache - named Cuchillo/Knife, after the massacre of his tribe - is taught that he is the gods' send to protect his people. Brought up to be a great warrior, he will attempt to reason with Boyd, and then fight an uneven battle against the Blue Demons.