This is the definitive account of what really happened on D-Day. From the motley crew of behind-the scenes inventors, creating the machines of amphibious attack, to the thousands of soldiers determined to change history.

In the spring of 1944, in one steamroller offensive, nearly two hundred thousand troops landed on the coast of France in a last ditch effort to reverse the Nazi Occupation of Europe.    

It was a plan orchestrated by the greatest military minds the Allies could muster.  But there were others - now forgotten - who toiled away behind the scenes in total secret.  A maverick collection of inventors, boffins, even sports heroes who had been drafted in from the most unexpected walks of life with a specific command: design and build an all-new mechanised armoury.  Machines that could breath fire, tanks that could swim, gadgets and mechanical devices that could find the weak spots in Hitler’s defences.

This is their story, and the story of the men who put these machines to the ultimate test on the battlefield - the ordinary soldiers that sixty years ago this June made the greatest amphibious invasion in history - D-Day.