German aircraft over Poland

The video covers the preparation and execution of military operations during the invasion of Poland in 1939. It begins with the training and final preparations of Messerschmitt pilots for combat sorties. The narrative then shifts to the German air assault on Poland, providing tactical support to advancing army troops. Finally, it discusses the Soviet invasion from the east, marking the end of Polish resistance.

What did the pilots exchange before the combat sorties?

When did the Red Army attack Poland from the east?