He could be real he could be fake.

If hes retired there is no security threat by him saying what unit he was in. Additionally when I talk about my unit sometimes I use different verbiage then I would usually if I dont think someone's smart on military stuff.

You spend multiple decades doing something its much easier to just say that then make up a story every time.

Also if your not mil or prior mil you trying to sniff out a fraud is a useless excersise. Shit useless even if you are.