As the machinations and manoeuvrings of Allied planners turned theory into method, all the elements necessar y for Overlord were busily being prepped. But how did the Allies protect the invasion as it mustered, or clear the way for its launch?

The dummy tank was revived from World War One and used throughout World War Two for deception. They are perhaps the best-known component of Operation Fortitude, but ironically, were also its least important facet

As engineers pushed to develop specialist equipment to ease the first wave ashore on D-Day, as planners pieced together the operational elements on map tables and planning walls, and as commanders completed wargames, exercises and a series of rehearsals that increased in size and scope, there was one matter that was the concern of many: secrecy.

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