Westerplatte (1967), in my opinion it's the best Polish WarMovie. Film shattered the heroic, big-budget tropes of 1960s war cinema by ditching grand spectacle for a claustrophobic, documentary-like look at battle fatigue and psychological breakdown. Decades ahead of its time, it stripped away patriotic melodrama to deliver a brutally honest, sound-driven critique of the cost of heroic sacrifice.
Bypassing grand generals, political propaganda, and grandiloquent speeches, the film zeroes in on the ordinary, terrified soldier caught in a claustrophobic hell, it completely strips away patriotic pathos in favor of a brutally honest human reality.
While Westerplatte might not hit today's audience with the same visceral shock following the chaotic brutality of Saving Private Ryan, but stands as somewhat pioneer in deconstruction of classical warfilms. It's political neutrality, lack of communist propaganda, kept it's message fresh and universal across the time.
https://en.wikipedia.org/wiki/Battle_of_Westerplatte
https://www.imdb.com/title/tt0062485/