TheCodeBreakers
however, and, equipped with intercept receivers and direction-finders,
began to eavesdrop on the Axis messages. During the Tunisia campaign,
the 128th, 117th, 122nd, 123rd, and 849th Signal Companies (Radio
Intelligence) tracked the Germans all over North Africa and, by
monitoring American communications, plugged leaks in Allied radio
security. The 128th first discovered that the Germans were withdrawing
from the Kasserine Pass, which they had taken a few days earlier in
America's first blooding in Europe. Later the 128th gave advance warning
of several enemy attacks. In Italy, the VI Corps intelligence officer said
that his radio intelligence platoon had done "outstanding" work during
the march on Rome and had supplied information second in value only
to battle reconnaissance. Thus, even though the manning and equipping
of radio intelligence companies did not get under way until relatively late
in the war, officers in the field soon declared their product to be "of
material value ..
annaabi.ee 
