The Allies had already employed deception operations against the Germans, aided by the capture of all of the German agents in the United Kingdom and the systematic decryption of German Enigma communications.
Sekutu telah menggunakan operasi penipuan melawan Jerman, dibantu dengan menangkap semua dari agen Jerman di Britania Raya dan dekripsi secara sistematis dari Komunikasi Enigma Jerman.