313th Military Intelligence Battalion (Airborne), 82nd Airborne Division: a history

From the 313th Battalion's first appearance on Fort Bragg, it was cloaked in an aura of secrecy. By the very nature of its work, the battalion was little known. The sensitive nature of the battalion's business, communications intelligence (COMINT), electronic intelligence (ELINT), electronic warfare (EW), communications security (COMSEC) and the thoughts of what it was, and who did what: these were considered to be 'deep cover'"--Back cover.