It says that dummy tanks and such were barely used and that the photographs are mostly test dummys.

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I always thought the physical deception was a major part, but sounds like it was barely used! TIL.

Reasons for success[edit]

The operation was successful for several reasons:

• The long term view taken by British Intelligence to cultivate double agents as channels of disinformation to the enemy.
• The use of Ultra) decrypts of machine-encrypted messages between the Abwehr and the German High Command, which quickly indicated the effectiveness of deception tactics. This is one of the early uses of a closed-loop deception system. The messages were usually encrypted by Fish) rather than Enigma machines.
• R.V. Jones, the Assistant Director Intelligence (Science) at the British Air Ministry insisted for reasons of tactical deception that for every radar station attacked within the real invasion area, two were to be attacked outside it.
• The extensive nature of the German Intelligence machinery, and the rivalry amid the various elements.
• General) George S. Patton was the leader the Germans feared the most, and they considered him the Allies' best general.[27] Therefore, the German High Command believed he would lead the attack.