Yeah I think they do that for movies as well. If directors want the real thing (because who doesn’t like practical effects and having the real thing in shot?), they’ll have to contact the DoD.

The DoD reviews the script for the movie, and they just water it down to absolute propaganda (they even say it out loud, they don’t hide it). US is always good, enemy always bad, US wins and saves the day. If there’s any criticism of the army, it’s usually brief and with a very weak point.

Full Metal Jacket isn’t approved by the DoD. Says everything you need to know about the, imo.