Well....just saying that the polishy cavallery against tank myth was cabled home by an american journo and not so much a Göbbles spin.
And if it was all about Nazi propaganda it doesn't explain the existence of polish jokes BEFORE and AFTER the war.
The Nazis were bad but not THAT bad....;)
I've read the famous William Shirer wrote the first time to a wider audience about it as he was in Poland writing about the german invasion..
I really don't think he tried to mock the Poles (as he had big sympathies for them)...he couldn't stand the Germans (wonder why), so it was surely rather admiringly meant!
funtrivia.com/en/subtopics/The-Pomorska-Brigade---The-Real-Story-193472.html
Shirer was taken to the battlefield on Sept. 3rd, and shown the bodies and horses still strewn about the area. The Germans had already taken their dead away, so it appeared that only Poles had been killed. Shirer reported the story, incorrectly, and help spread the myth of horsemen charging tanks.
historynet.com/polish-cavalry-charges-tanks.htm
...
This "skirmish at Krojanty," described in sensationalist terms by journalists like William Shirer, is almost certainly the source material for the fanciful tale of Polish cavalry charging tanks.