Documentary, narrated by Michael Leighton, looking at Germany's revolutionary Blitzkreig tactics that allowed them to overrun most of Europe between 1940 and 1942. Using air power to compliment concentrated armour, the Germans were able to sweep aside the armies of Czechoslovakia, Poland, Norway and France, and force the British to evacuate at Dunkirk. Featuring archive footage, illustrations and graphics, as well as expert commentary and analysis.