The Congressional Research Service has just published a short reference document that might be of interest to many newsletter readers:
The guide provides information on locating military unit histories and individual service records of discharged, retired, and deceased military personnel. It also provides information on locating and replacing military awards and medals. Included is contact information for military history centers, websites for additional sources of research, and a bibliography of other publications, including related CRS reports.
Military Service Records, Awards, and Unit Histories: A Guide to Locating Sources can be downloaded for free at: https://fas.org/sgp/crs/secrecy/RS21282.pdf.