IATACSImproved Army Tactical Communications System
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One thing was certain according to one signal officer, "The thirst for communications could not be supported." The VII Corps had two MSE equipped divisions and two with IATACS (AN/TRC-145 and AN/TTC-41) equipment.
The US Army improved its area communications systems with the fielding of the Improved Army Tactical Area Communications System (IATACS).
IATACS currently is being replaced at echelons corps and below by MSE and at echelons above corps by digital group multiplexing.