The Sundown Stallion

A rogue stallion, the last of his breed on the Texas prairie, raids Hub Anderson's ranch and takes the mare he brought home from the war. Hub goes after her and runs into trouble with a wealthy, violent ranchman.
Hub's friend Charlie Boone, an ex-slave who somehow found the money to buy land and make a home for his family, faces night riders who plan to run him off his place. Or hang him.