Gibson's new movie is a sort of a "Four Feathers" movie, conscientious objector becomes war hero, but based on a true story. Check it out.

http://blog.xbradtc.com/2016/07/dont-screw-this-up-mel.html

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken