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.

Items from the Psychological Warfare Branch focus on the impact of propaganda and counter propaganda on the target audeinces. Reports in this subseries include an analysis of propaganda upon French citizens, and a booklet on the functions of the 5th Army propaganda team.

Journalism 102 was a course that covered the principles of Journalism, and at times was a continuation of Journalism 101 to create a year long class. Items in this subseries consist of course syllabi, class handouts, quizzes, exams, lecture notes and other material Riegel had that was relevant to the course.

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.