Sep. 1 is commemorated in Poland as a day of mourning, while they celebrate November 11 as independence day.
This is the “false flag” concept near and dear to the hearts of all Deep State operatives.
As is Sep. 17 when the Soviets invaded. Never forget it was a joint German-Soviet operation.
My great-grandfather was fairly prosperous in the new battery business and owned factories in Langfuhr. On September 1-7, they had a ring-side seat to the opening of WW II. I'm sure they could hear the SMS Schleswig-Holstein bombardment of Westerplatte and later could see and hear the Stuka dive bombers attacking Westerplatte.
It must have been a horribly frightening experience. Of course, that brief battle in Danzig was nothing compared to what was to come via the Soviet invasion from the east in late 1944 and early 1945.