One of their best sources was the American Military in Cairo which gave excellent information about British intentions in North Africa until the US code was changed and persons sent back home
They also read the Anglo-American Convoy data leading to many sinkings.
These errors were first resolved in 1943.
So no April Joke
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'German Navel Code Breakers' by Jak.P.Mallmann Showell.
Contemplating their belly buttons?
Or perhaps a belated April Fools prank
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