I wouldn't worry about it. Some will, some won't. The fact that he's asking the question is a good sign, I think.
Still, it's ridiculous for anyone in authority to think that they will have the military locked down to the point where they can count on unquestionable loyalty in the face of such orders. Like I said in a similar discussion, if the Soviet military fell apart on such orders, how could ours possibly be expected to go along with it?
I agree that they would be in for a big surprise - I also believe that their egos are big enough that they might actually believe it. Especially with all the political animals being put in the positions that were once reserved for warriors.