Don't be suprised when he comes back for good, that he hangs out with his platoon a lot. The visual scanning will probably be there for awhile but other things should go away. Try to keep him engaged in reality and not stuck inside his own head, ruminating on thoughts and such. I found that I was very comfortable at bars, stores, crowded places when I was with my platoon mates. When I got out and went back home, even with my own friends that I had known for 10-15 years I felt as if I had to watch my back all the time, really cuts down on the fun. lol I'm single but IMO let him hang out with his combat buddies if he wants too, as long as it's not interferring with your marraige and/or he's drinking too much.

Best wishes,
Scuba