Normandy Landings
Elements of the Bodyguard plan were in operation on June 6, 1944 in support of Operation Neptune (the amphibious assault of Normandy). Elaborate masquerades were undertaken in the English Channel by small ships and aircraft (Operation Glimmer and Operation Taxable) to simulate invasion fleets lying off Pas de Calais. At the same time Operation Titanic involved the RAF dropping fake paratroopers to the east and west of the Normandy landings.
Joan Pujol Garcia, a British double agent (code named Garbo) in high standing with the Germans, transmitted information about the Allied invasion plan with a further warning that the Normandy invasion was a diversion. This information was transmitted at the behest of the British High Command in order to increase his credibility to the Germans and was done at a time when it was too late to fortify Normandy.
Read more about this topic: Operation Bodyguard