Dear Mr. Webster,
Thank you for posting your request to History Hub!
We searched the National Archives Catalog and located 15 series of records related to the 1st Artillery Regiment in the 1860s that may contain some relevant information. These series are part of the Records of U.S. Regular Army Mobile Units (Record Group 391), and they have not been digitized. For access to and information about these and similar records, please contact the National Archives at Washington, D.C. - Textual Reference (RDT1) at email@example.com.
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 information is helpful, and best of luck with your research!