Dear Mr. Glenn,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Navy General Courts-Martial Records, 1951 - 1976 in the Records of the Office of the Judge Advocate General (Navy) (Record Group 125) that include Marine Corps cases and are arranged chronologically by date of the courts-martial, thereunder alphabetically or by courts-martial case numbers, depending on the year of the courts-martial. The index to these records is organized by year and you must provide the date of the court-martial as well as the name of the sailor or Marine being tried. For more information, please contact the National Archives at St. Louis (RL-SL) via email at firstname.lastname@example.org.
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 RL-SL. We apologize for this inconvenience and appreciate your understanding and patience.
We suggest that you review the volume titled Marines and Military Law in Vietnam Trial By Fire for additional information and/or resources.
We hope this is helpful. Best of luck with your family research!