I think the battle of Dunkirk isn't a good base to make a good war movie. Globally, the battle of Dunkirk is the retreat of allied forces from Dunkirk to Britain under german attack. It's not a good subject to make a good war movie. Retreat is not cinematographic. The movie is far from being a disaster... but it's not exciting at all. In the great war movies you find moment of excitation, moment of fright.. not in Dunkirk. Globally i found the film rather dull. & i think i'm not a great fan of Nolan.