re: #635 sphincter
Really? Where did you read that? I love reading history and have not come across that. Any info. you have would be appreciated.
Martin Gilbert’s one-volume history, The Second World War. (I think.)
IIRC, a German U-boat had captured an Australian mailboat, that had American intelligence documents on it, demonstrating the code had been broken. But inexplicably, the Germans just never told the Japanese about it. Arguably, this cost them the war!