On September 1st 1939, Hitler’s army invaded Poland, starting WWII and showing the world how they planned to dominate. This method would come to be known as Blitzkrieg or Lightning War, and it would change the face of warfare forever. In this episode of WWII In Numbers, we take a look at the numbers behind this Blitzkrieg, how it was made possible and why the Allies were unable to prevent its devastating effects.