Add in that military personnel are trained to obey.
The U.S. Supreme Court has ruled that police officers can briefly detain and search a person if they have a reasonable, articulable suspicion that he or she is committing, has committed, or is about to commit a crime. But cops need no such reasonable, articulable suspicions to engage people in consensual encounters: interactions that a reasonable person would feel free to decline or terminate at any time. Ordinary people are free to stop and talk to strangers, the thinking goes. Why should police officers be denied the same privilege?
And yet, as I’ve written before, a consensual police encounter is often anything but. Cops have guns, and handcuffs, and the power to arrest you or make your life difficult if you are rude or uncooperative. If a cop asks for a moment of our time, most of us will automatically give it, even if we know that we technically have the right to refuse.