The Classification Lists, 1917–1918 for the World War I Selective Service System are at the National Archives at Atlanta. Contact them at atlanta.archives@nara.gov.
Thank you for posting your request on History Hub!
As another History Hub community member has suggested, you may wish to request a search of the series Classification Lists, 1917–1918 in the Records of the Selective Service System (World War I) (Record Group 163). Each entry shows the registrant’s order number, name, race, serial number, classification, physical examination information, date to report for military duty and entrainment to the mobilization camp, and the date he was accepted, rejected, discharged, or reported delinquent. For more information about and/or copies of these records, please contact the National Archives at Atlanta (RRFA) via email at atlanta.archives@nara.gov. Please attach a copy of the draft registration form when requesting a copy of his classification history, as this will make it easier for RRFA staff to locate the correct entry.
If you believe that your grandfather did serve in the U.S. Armed Forces, we also suggest that you request a copy of his Official Military Personnel File (OMPF), which would be in the custody of NARA's National Personnel Records Center (NPRC) in St. Louis. In many cases where Army and Air Force personnel records were destroyed in the 1973 fire at the NPRC, 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. Veterans and next of kin of deceased veterans also may use eVetRecs to request records. See eVetRecs Help for instructions. If there is any information requested by the form that you do not know, you may omit it or provide estimates (such as for dates), but the more information you provide, the easier it will be to locate the correct file if it survived the fire. For more information see Official Military Personnel Files (OMPF), Archival Records Requests.
For a complete copy of a personnel file, in Section II, on the line for "Other" (Specify), write "Complete copy of every page of personnel file - not an extract."
Archival OMPFs may also be requested by visiting the Archival Research Room at the National Archives at St. Louis. Please see the linked web pages for more information. Please email stlarr.archives@nara.gov for further assistance prior to making an appointment.
We invite you to continue the conversation with community members on History Hub, and we hope this is helpful for your research!
Sincerely,
Textual Reference Archives II Branch (RR2RR)
[RR2RR 24-11565-RS]