 To aid in the deception, signallers from the 61st Infantry Division maintained wireless traffic, to give the Germans the impression of an actual 80th Division.In addition, Juan Pujol García, the British double agent known as "Garbo" who played a vital role in Fortitude, reported to the Germans that the 80th Division was undertaking assault training.Fortitude South has been credited with ensuring the German 15th Army was not deployed against the Allied invasion force too soon and ensuring the success of Operation Overlord.