Wolne miasto (1958)

Quote:
The heroic struggle of Polish post office workers in Gdansk on the first day of World War II.

Wikipedia wrote:
It was the first Polish film about September 1939. The director presented the drama of a group of civilians – employees of the Polish Post Office in the Free City of Gdańsk – caught up in the gears of great history. Fragments of archival film footage of the attack on the post office add authenticity to the film.