Fortitude Plan: In the evening, the Allied military radios in the South-East of England, which had been transmitting continuously, suddenly went silent, just as the military radios in the South-West of England had done before the Normandy landings. At the same time, Roman Czerniawski, alias Brutus, considered by the Nazis to be one of their best agents thanks to the patient work of the British intelligence services, transmitted to the Nazis that he had heard Patton give the order to begin the landing at Calais of the non-existent 1st United States Army Group.
