The landing of Allied forces on the shores of Normandy on 6 June 1944 was the greatest amphibious invasion in history. Technology and innovation played crucial parts in the D-Day drama – from tank-carrying gliders, swimming tanks and the Mulberry harbors, to radio and radar aids that ensured landing craft arrived on the right beaches and combat aircraft overhead were controlled. D-Day Operations Manual describes the development, construction and use of a wide range of innovative machines, structures and systems, explaining their uses on D-Day and after, and revealing how they contributed to the success of 'Overlord.'