Here is a German intelligence map issued on 3 July 1944, nearly a month after D-Day, clearly showing the success of Operation Fortitude. Thanks to Allied deception plans, the Germans hugely overestimated the number of Allied divisions stationed in Britain, especially in the south-east. They believed for several weeks after June that the Normandy landings were a feint, and that the main Allied attack would come via the narrow Dover Straits at the Pas de Calais. They held the 15th Army in defensiv