I know your son probably doesn't want his dreams dashed, but if I were him I'd stay away from the military or any other element of the federal government. I'm sure he has patriotic ideals about going into the Army, but would probably just have those ideals broken and urinated upon once he actually became exposed to the reality of the current military. So dreams can either be dashed now, or dashed later.
I get the argument that it's better to have good people on the inside, but I also get the argument that at some point we just need to withdraw our consent by no longer participating in a rotten edifice. A fish rots from the head down, but it does mean that eventually the tail has to rot too.
Ironically, what they want is an army ready, willing, and able to exterminate exactly the people who used to be that army.