Well, I assumed the clothes would be something carried over from before his enlistment in to the Marines.
Also: no specialization starts? That doesn't seem like it would make sense to me, but I will edit accordingly. I don't have the time at the moment, so most of the editing will likely come tomorrow if that is acceptable.
Besides, if it would be too much of a burden then I can simply go to another plot if that would be more convenient for the GMs/moderators. I'm open to wherever the aformentioned authorities feel he would belong.
EDIT:
Okay, I had a few minutes to squeeze in to my schedule for this. I edited the end of the history to remove the sniper school bit (though I do envision him more of a sniper or DM-type soldier in the end), removed the sniper training skill, and I'll go over it later with a fine-toothed comb to make sure that the entire thing is consistent with his simply being a Marine.