It's Forrest Gump goes to war, with a constant instrumental "drumbeat" substituting for a musical score. Uses "expired film" color either for a vintage look, or to increase the feeling of stress. The lead characters seem to be involved in everything that happened at Dunkirk, selflessly rescuing dozens while being rejected by others. There is no telling of strategy or options, it merely shows a continual tableau of sympathetic characters in constant peril. Seeing someone almost certainly drowning may be a heart wrenching scene, but when the whole movie is nothing but, it gets dull. I stopped watching with 25 minutes to go.