His CD doesn't need to be mounted if you only have one medal.
I've heard that before, but wasn't 100% sure if it was true. I just remember seeing some guys getting jacked up for not having their GCS(only medal they had) mounted after tour. Plus in my current unit, and seeing pers from other units it looked like everyone had their single medal mounted.
“Out of every one hundred men, ten shouldn’t even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back.” - Heraclitus