01-07.09.1939
At 04:45, 1st September 1939, German SMS Schleswig-Holstein battleship, had fired upon Polish Military Transit Depot, the ship was in Gdansk’s port on what had been called a ceremonial visit in August – well it was a ceremony, full 7days of celebrating.
Battle of Westerplatte
German troops at Westerplatte – Wikipedia
Schleswig-Holstein firing at Westerplatte – Wikipedia
Polish soldiers being taken into captivity after the capitulation of Westerplatte. Danzig, September 7, 1939 – Wikipedia