Of what i remember for German side, Doenitz had huge trouble with it, at the Nuremberg trial. Because he said during the war at his Kaleuns « an ennemy surviving crew is an other ship crew next time... »
Meaning would be nice to not have survivors.
And this meaning was up to the Kaleuns to understand it...or not.
Hopefully very few of them understood and applied this hidden order.
And as it was a kind of hidden order, Doenitz made it through the trial...for this charge of indictment.
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