Dear Mr. Bateman,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located 1 series, 2 file units & 10 items pertaining to the 1st Air Defense Artillery after 1980. Unit records of the 4th Battalion, 1st Air Defense Artillery for 1979-1980 may be still in the custody of the Army. For the exact location of these files, please contact Anthony Crawley-Gibson, Army Records Officer, Army Records Management Division, 7701 Telegraph Road, Alexandria, VA 22315. The telephone number is 703-428-6464 and email is email@example.com. Please request the name of the facility, transfer numbers, and box numbers.
Personnel Strength Zero Balance Reports (or SIDPERS C-27 Reports) replaced the Morning Report in 1974. The two major functions of the C-27 Report are for strength accounting and to correct the duty status of each member of the Army unit on the last day of each month. SIDPERS C-27 Reports for the period in which you are interested are in the custody of NARA’s National Personnel Records Center in St. Louis. Please complete a GSA Standard Form 180 and it mail to NARA’s National Personnel Records Center, (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002.
We hope this is helpful. Best of luck with your research!