| Capt. Morgan |
11-01-10 04:44 PM |
Quote:
Originally Posted by Tessa
(Post 1526316)
As time progresses the radio traffic does start to lighten up once Donitz realizes that the allies have cracked the Enigma code. There is a lot less traffic until they get the 4 rotor enigmas and the allies can't read their mail anymore.
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Actually, Donitz suspected a number of things were the cause of his losses, and investigations he conducted led him to blame espoinage primarily.
He instituted the 4-rotor M4 Enigma machine in February 1942 only as an additional insurance. Donitz never realized that the codes had been broken (nor did anyone else until 1973/74, when Gustave Bertrand and F. W. Winterbotham published their accounts of the Enigma code breakers).
The M4 did however result in a 10 month blind period in the Atlantic for the allies, which coincides almost exactly with "the second happy times". Fortunately Donitz - again - didn't succeed in putting 2 + 2 together. |
