I'm trying to remember the name of a western film I watched when I was younger. It may have been a mini series. It had a half native american/ half white hero in love with a spirited young white women. It seems like they grew up together. She married a rich southern jerk who mistreated her. Somehow, the husband is killed. (I think her husband finds out she is pregnant with the hero's baby.) I can't remember if the lover kills the or if the wife does. If it was her, he takes the blame. She runs off with him, and people come after them. There is another story intertwined of a black hero and the woman he loves. I can't remember much about his story except that he got hurt after helping some people/ standing up from something that was right (I think the bad guys castrate him.) At the end of the movie the two heroes are killed in a big explosion by the bad guys.