Back in the past, the stuff was pretty realistic. I suspect there will be marked vehicles, and other denotations, aside from the cant miss parachute drops.
In Southfield the exercise was supposed to take place entirely within the confines of an Army reserve center but somebody went for coffee or something in a Humvee with ISIS flags flying proud. LOL
A few years back a guy was arrested for driving a restored WWII era military truck with machine gun mockup on the back. He probably wouldn’t have bee arrested if he hadn’t been firing the “gun” at people on the sidewalks.