Honestly I found the author (who wrote the book) to come across as being very narcissistic seeing him on TV once or twice before he got killed. Just my opinion not saying her was a bad person. Anyway for that reason I don't have any interest in the film.
I'd would add to the previously mentioned docs the film Hornets Nest which about an Army unit in Afghanistan. You can better formulate an opinion with those docs. Sebastian Younger did another doc called Kongral as well.
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