Dear Ms. Payne,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Official Military Personnel Files, 1912 - 1998 in the Records of the Army Staff (Record Group 319) that includes the Official Military Personnel File for George S. Patton Jr. This file has been digitized and is available online through the Catalog.
We also located Records of Cavalry Regiments, 1916 - 1937 in the Records of U.S. Regular Army Mobile Units (Record Group 391) that includes records of the 8th Cavalry Regiment, which was his unit, during the period September 26, 1915 to March 13, 1916. These records have not been digitized and are not available online. For more information about these records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at Archives2reference@nara.gov.
Additionally, we located General Orders, 1913 - 1919 and Special Orders, 1913 - 1919 for Fort Bliss in the Records of U.S. Army Continental Commands (Record Group 393). These records have not been digitized and are not available online. For more information about these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at Archives1reference@nara.gov.
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 RDT1 and RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
Lastly, you may be interested in the George S. Patton papers, 1807-1979 at the Library of Congress. And the General George Patton Museum, the 1st Armored Division and Fort Bliss Museum, the U.S. Army Heritage and Education Center, and the U.S. Army Center of Military History may be able to assist you.
We hope this is helpful. Best of luck with your research!