I am not familiar with the ribbon and medallion, but it is reminiscent of the kind of things lodge members (Masons, Elks, Moose, etc. Lodges) might wear for ceremonies. Perhaps one of the message board participants who are members of one of these lodges or organizations will be able to identify it. I have been a Boy Scouting volunteer for 40 years and we have our uniforms and badges and I guess it is similar - OK, maybe not.
I did e-mail the Jackson Barracks Military Library e-mail address this evening and it bounced back as a "no delivery."
Very best & sorry I couldn't help more.
Don Parker