I'd recommend The Thin Red Line - came out about same time as Saving Private Ryan, but based on the battle for Guadacanal, and based on the autobiography of one of the combatants. Delves much deeper into the pyschology of war, and the needless loss of life.
All time favourite has to be A Bridge Too Far though - having spent several years working alongside the Parachute Regiment it was a regular watch. It's another film that glories in our spectacular failures during WW2, but which we look back on with admiration at the bravery displayed in the face of over-whelming odds - it was on recently and I still loved it.
Another favourite, although not truly a war film, is The Hill with Sean Connery as a military prisoner in North Africa during WW2, and his battle of minds with the despot who is the warden of the prison camp - old, in B&W, but still brilliant and brutal.
I saw Dunkirk in the cinema, and really enjoyed it, although I doubt it would have anywhere near the same impact in your wonky TV! Worst thing that happened during the film was my 15yo son asking me if it was WW1 or WW2 - FFS, what do they teach kids these days![]()
Great recommnendations and films
Films about "wars" evolve with time. The trend tends to be from the victories to the glorious failours and then more subtle details. Plus, unfortuately there are new wars.
Regarding WW2, in additon to the about mentioned films I would add "The Pianist" by Roman Polanski, "Schindler's List" by Steven Spielberg and "The Reader" by Stephen Daldry.
As regards more modern conflicts, I recommend "Spy Game" by Tony Scott as well as "The Hurt Locker" by Kathryn Bigelow.