Dear Mr. Osbourne,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Record Books of Executive, Legislative, and Judicial Offices of the Confederate Government, 1874 - 1899 in the War Department Collection of Confederate Records (Record Group 109) that contain 670 file units relating to courts-martial. Many of these files have been digitized and may be viewed online. We also located Confederate Manuscripts, 1874 - 1899 in Record Group 109 which includes records relating to courts-martial. The bulk of these records have not been digitized. For more information about these records, please contact the National Archives in Washington, DC - Textual Reference (RDT1) 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. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!