TheCodeBreakers
Under the Chef W.N.V. came the Amtsgruppe W.N.V. Its chief was
Major General Fritz Thiele, 48, a close colleague of Fellgiebel's who had
previously headed the O.K.H. communications and intercept
organization. He became Chef, Amtsgruppe W.N.V. the day the war
began. The unit comprised radio and wire branches, which maintained
communications between the headquarters of the three armed forces
high commands, a technical equipment office, an administrative office,
and the Chiffrierabteilung ("Cipher Office"), usually abbreviated "Chi."
Colonel Siegfried Kempf assumed command of Chi on the same day that
Fellgiebel became Chef W.N.V. Then 43, he was a career communications
officer, a martinet disliked by his subordinates. He was succeeded in
October, 1943, by Colonel Hugo Kettler, 48, who had had considerable
intercept experience and who brought out the best in his men.
In 1944, the Chiffrierabteilung was divided into eight groups. Four
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