Riegel's correspondence in this series is primarily between different awards administrators and judges. Riegel corresponded with approximately 320 different individauls within this subseries. Correspondents of note include Mrs. Dupont, Turner Catledge, and Sol Taishoff.

Riegel's collection of government reports center around the effectiveness in developing and implementing propaganda addressed to the Axis powers and neutral and liberated countries. Reports tend to focus on one aspect of propaganda ranging from understanding the target audiences culture, to forms of counterpropaganda used by enemy forces.

Items in this series pertain to Riegel's personal correspondence between himself and colleagues, friends, and family. Some material is related to or mentions his work, but the majority of the material is about his or other people's personal lives, opinions, and thoughts around world events.