Forget the war (there's no bloodshed), forget the action (that's limited), forget sex - the nearest we get is Gregory Peck's thigh and there is not a woman in the film! - what Darryl F Zanuck's masterpiece shows is the positive attributes of great leadership along with the challenges it faces. It also exposes the leader as a 'friend' as a weak and ultimately failing approach. This film was designed to show leadership in its toughest environment and it achieves this wonderfully - remember it's based on fact so it has relevance where many other films fall down (Braveheart, Jerry Maguire etc) which are so far removed from any origins they are no longer connected to achievable outcomes.
Watch the nuances of expression - with no music to mask these, they are raw and meaningful.
Some amazing one-liners 'I didn't ask you to ask me....' 'Spit it out, with the bark on...' etc
A must for any aspiring Leader! - watch it at least 3 times to start to fully appreciate its complexity and subtlety, with the lessons it holds.