TheCodeBreakers
This was especially true after the
Normandy invasion. But this means was not omniscient. In the fall of
1944, when General George Patton's army was preparing to bite out the
fortress of Metz, the German forces detected his preparations, largely
through radio. "Yet," wrote a German staff officer, "the actual attack on 8
November came as a surprise to the front line troops."
In the field, the German Army's communication intelligence unit
worked closely with the Luftwaffe's Funkauf-klarungsdienst ("Radio
Reconnaissance Service"). This was the intelligence side of the Air Force's
Nachrichten-Verbindungswesen, or N.-V.W. ("Intelligence and Signal
System"), whose chief served on the staff of the O.K.L. He also prescribed
secret communications systems for the Luftwaffe. Air-to-air
communications, which were mostly by voice, employed simple
codewords to disguise unit names, much as American pilots referred to
one another as EASY RED or GREEN ARROW in the style made familiar by war
movies
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