There is a misconception that the Polish army charged German tanks with horses. In reality, by 1939 only 10% of the Polish army was cavalry, and were rarely used for any offensive charges.

Another misconception: the Polish Air Force had all of its planes destroyed on the ground a few hours into the war. Most of the planes were actually moved to more secure and camouflaged airfields, and the Polish managed to take down 285 Luftwaffe aircraft during the invasion.