Dear Ms. Hanson,
Thank you for posting your request on History Hub!
We suggest contacting the National Personnel Records Center (NPRC) in St. Louis. Although the Official Military Personnel Files (OMPF) was either damaged or destroyed in the 1973 fire, the Army and Air Force provided the National Archives with auxiliary records to assist in rebuilding records. Please ask him to submit a SF-180 to the NPRC, 1 Archives Drive, St. Louis, MO 63138. Fill the form out to the best of your knowledge. If he doesn’t remember everything, please have him fill in estimations as they will help the NPRC staff to locate anything they have regarding his service.
We hope this information is helpful.