7 February 1945
AG 322 OpSC
SUBJECT: Operational Control and Technical Direction of Signal Intelligence and Signal Radio Intelligence Units.
TO: Commanding Generals:
US Strategic Air Forces in Europe
Each Army Group
Letter, this headquarters, file AG 322 OpSIG, subject as above, dated 5 April 1944, is rescinded and will be destroyed in accordance with the provisions of AR 380–5, dated 15 March 1944. A certificate of destruction will be rendered thereon and submitted to this headquarters.
In order to coordinate the interception of enemy radio transmissions, authoritative operational control of all signal intelligence and signal radio intelligence units ...