La Grande Illusion (1937) by Jean Renoir, Clip: Boëldieu is shot by Rauffenstein
French aristocrat de Boeldieu creates diversion so that others can escape. He is shot by German aristocrat von Rauffenstein. World War I changed the social order in many ways.
William Wyler's best film The Best Years of our Lives.
It's such a great film it would be an injustice to pick one scene. Harold Russell lost his hands during WWII, those are not prosthetics he's wearing. It came out in 1946 and it's still in the 8/10 territory. William Wyler also served during WWII.