The Treaty of Versailles, imposed on defeated Germany following World War I, declared Danzig to be a free city jointly administered by Poland and the League of Nations. Germany bitterly resented the loss of this largely German city, which was also an important port on the Baltic Sea. The return of Danzig became a central feature of Adolf Hitler's foreign policy. This footage shows pro-German forces besieging a Polish garrison in Danzig's main post office. Germany annexed Danzig after the defeat of Poland in September 1939.
Armed Polish bands still hold the post office building. From their base here, they threaten the entire city. Units of the Danzig Home Defense Force, protected in an armored car, smoke them out of their dangerous refuge.