A Generation
Pokolenie (original)
Starring Tadeusz Łomnicki, Urszula Modrzyńska, Tadeusz Janczar, Janusz Paluszkiewicz, Ryszard Kotys, Roman Polanski, Ludwik Benoit, Zofia Czerwińska, Zbigniew Cybulski, Tadeusz Fijewski
It's a drama and war movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.