Dear Mr. White,
Thank you for posting your question on History Hub.
The National Personnel Records Center in St. Louis would be your first point of contact: The National Personnel Records Center (NPRC). You can begin the process of requesting his DD-214 by visiting the link provided here: https://www.archives.gov/veterans/military-service-records/.
You may want to request a copy of his entire Official Military Personnel File (OMPF). OMPFs and individual medical reports for enlisted men of the U.S. Army who were separated from the service after October 1912 and before 1959 are in the custody of NARA's National Personnel Records Center (NPRC) in St. Louis. In many cases where personnel records were destroyed in the 1973 fire, proof of service can be provided from other records such as morning reports, payrolls, and military orders, and a certificate of military service will be issued. Please complete a GSA Standard Form 180 and mail it to NARA's National Personnel Records Center, (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002. For more information see Official Military Personnel Files (OMPF), Archival Records Requests.
Additionally, here is a blog post describing WWII Military Unit Records at the National Archives: https://historyhub.history.gov/community/military-records/army-and-air-force-records/blog/2017/08/25/wwii-military-unit-records-at-the-national-archives. The National Archives at College Park has custody of most US Army unit records from World War II. Please note that these records generally do not notate the actions or movements of individuals assigned to a unit, but rather provide details of the actions, enemy contact, missions, and locations of the unit as a whole.
This may be some duplication of the above links, but here is a page on Requesting Veterans’ Service Records from the National Archives:
We hope this information is helpful.
The National Archives and Records Administration