Escobar gives him the horse off screen when they leave the townsite of the intial battle to ride to hijack Kennedy's train.
Wilson doesn't say any thing to the horse at the end of the film and doesn't cross a river. He just waves to Escobar and rides back along the beach towards the village (we assume) where Mrs Kennedy was left.
That's another movie with Robert Mitchum you've mentioned - The Wonderful Country. He has to leave his horse at the end, and he says: "Lagrimas (name of the horse). The horse called tears."
I often times watch these movies chopped up with commercials. Since I don't have patience for a lot of commercials - I end up not seeing the whole movie. Sometimes, over time, I will come across (in this case, what I think is) the same movie and try to "catch up". I don't have money for anything like netflicks or Roku-type devices and I don't want to watch a whole movie on my computer.
So, yeah two similar movies Bandido - 56' and The Wonderful Country 59'.
The ending where he has to say goodbye to Lagrimas was so sad - and yet tempered by the man's experience seeing so much death. A bitter sweet ending.
No problem. I'm a big fan of westerns and I can watch them often on a couple of domestic TV channels (one of them puts no commercials at all in it!), so I couldn't miss, nor forget, that scene. I always feel sorry for the wounded or tired down horses who are about to die, and this was especially sad scene and Mitchum's comment fitted in perfectly for the ending.