In the first years of World War Two, Hitler’s Germany crushes its enemies in a series of lightning offensives. A new word is coined to describe this incredible string of successes –‘Blitzkrieg’ or ‘Lightning War’. Extraordinary ruins scattered across Europe tell the story of a revolution in tactics and weapons which almost gives Hitler the chance to create his Thousand Year Reich.

This is the story of the world’s first true submarine; speed, the ability to stay submerged for days and unrivaled fire power make the Type 21 U-boat Hitler’s ultimate deep sea destroyer.

The Nazi’s grasp on a small corner of Britain, the Channel Islands, becomes an obsession for Hitler, as he turns them into one of the most heavily fortified places on the planet – his island megafortress.