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The Double Cross System or XX System, was a World War II anti-espionage and deception operation of the British military intelligence arm, MI5. Nazi agents in Britain were captured and used by the British to broadcast mainly disinformation to their Nazi controllers. It is unlikely that the term originated from this since it did exist in the 19th century
BritinAfrica. It is normal to deal with one question at a time unless you think mine is too absurd ! Sorry if it is too difficult, I just thought it may be more fun to think for a change rather than Googling/wiki the answer directly which is what I just did with yours. I will give another clue if you like. |
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