Segunda Guerra Mundial: Secretos desde el cielo

1st September 1939: A German battleship opens fire on the city of Danzig, the start of Hitler's campaign to wipe Poland off the map. From the ferocious German Blitzkrieg tactics, a secret meeting between dictators in a Nazi train bunker, a daring escape from Auschwitz, to the desperate fight to save Warsaw from complete destruction, this episode charts the untold story of the Battle for Poland.