prior military

I'm not sure how many times this may have been covered already or if it has been talked at all but it's exactly what the description above asks. If someone getting off of five years of active duty in the Marines were wanting to pledge a fraternity he was a legacy in, what would a fraternities general consensus be? Are older gents not a welcome sight or seen to much as a problem? Would his experiences abroad be an interest to a fraternity? Questions I've had just no one to ask. Don't be alarmed if you see me posting this in another universities page, more opinions the better.