I didn't know you could be awarded two Good Conduct Medals. I have seen documentation where the GCM was revoked. So, I guess he could earn it back after the appropriate time period (not sure if it was 9 mo or 1 year).
I agree; the medals seen in his photo all seem to be the 3 campaign medals that Marion listed. The GCM is easy to spot as it is small, alternating stripes.
For most medals, the second award was denoted by an Oak Leaf. The general orders would say that it was for the awarding of a 2nd Oak Leaf for the Bronze Star or such.
Battle stars were added to campaign medals. Other devices were "V" and silver battle stars, but I don't quite understand why and when they were awarded. For some samples, see this link to Audi Murphy's Medals: Audie Murphy.
Steve
