Jargon Buster

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D-Day produced thousands of code names, acronyms, abbreviations and many other strange and unusual terms and names!

We have compiled a list of some of the most common terms related to D-Day. If you think something is missing, please let us know.

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"ultra"

Ultra

The Allied codename for the intelligence taken from intercepts of the German Enigma signals. Ultra intelligence was given to senior commanders during the Battle of Normandy to help them to base their plans on what the Germans were doing.