William Holden, Warren Oates, Ernest Borgnine ~ just a few notables from The Wild Bunch movie ~ full of desperation against changing times and a planned robbery of a U. S. army train as outlaws on the Mexican - U. S. frontier face the march of progress  including pump shotguns, machine guns and automobiles mixed with horses and Winchesters in this ultra-violent Western movie in the early 20th Century era.