Operation Fortitude: The D-Day Deception Plan The Greatest Military Con in History? Operation Fortitude was the brilliant deception plan that fooled Hitler and protected the D-Day invasion, saving countless lives. In 1944, the Allies created a massive, non-existent army—complete with inflatable tanks, dummy aircraft, and even General George S. Patton as its fake commander—to convince the Germans the main invasion would hit Pas-de-Calais, not Normandy. Double agents like Juan Pujol García (codena