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Tinfoil is good for more than just making hats... 20th Century History (sh.itjust.works)
submitted 10 months ago by to c/historymemes@piefed.social
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In order to deceive Nazi Germany about the real target of the D-Day invasion, the Allies dropped literally tons of aluminium foil strips (then codenamed "Window", now known as Chaff) from aircraft to create the appearance of a large fleet moving across the English Channel towards Calais on German Radar screens just before the actual invasion started

Thanks to Bletchley Park reading German ciphers, Allied high command could watch the Germans fall for the deception almost in real time.

Allied Soldiers loading tin foil into airplane - Nazi German soldiers: "Herr Kommandant, ze Invasion Fleet haz been spotted on zeh Radar!"
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[–] 9 points 10 months ago*

Some, but since radar was a defensive tool, and the glorious Nazi would of course perpetually be on the victorious offense, so there wasn't much... Political Will to build radar systems.

And when they did, there wasn't much money for it.

But they did exist.

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