I am not sure that is true. As an outside observer of the US I see a lot of highly trained, potentially dangerous veterans who came home to a pile of broken promises with broken psyches and sometimes broken bodies. There are now decades worth of these guys milling around in a society awash with firearms and blitzed with misinformation. It's a powderkeg that might just go off unexpectedly. Of course there are side effects to those middle east adventures.