Dear Ms. Marietti,
Thank you for posting your inquiry on History Hub!
What year was Mr. Nieves distcharged from service? Assuming that it was after 1958, we suggest that you request a copy of his Official Military Personnel File (OMPF). Official Military Personnel Files (OMPFs) and individual medical reports for those who served in the U.S. Army after 1958 and before October 16, 1992 are in the custody of NARA's National Personnel Records Center (NPRC) in St. Louis. 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. You also may fax the form to 314-801-9195 OR view the record by visiting the NPRC Archival Research Room in St. Louis, MO. Veterans and their next of kin also may use eVetRecs to request records. See eVetRecs Help for instructions. Certain information in the records is not available to the general public without the written consent of the veteran or his next of kin. For more information see Request Military Service Records.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from NPRC (National Personnel Records Center). Also, NPRC will continue servicing requests ONLY associated with medical treatments, burials, and homeless veterans seeking admittance to a homeless shelter. If your request is urgent, please see Emergency Requests and Deadlines. Please refrain from submitting non-emergency requests such as replacement medals, administrative corrections, or records research until NPRC returns to pre-COVID staffing levels. Please check archives.gov/veterans for updates to the NPRC operating hours and status. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information assists you with your request!