The Motivation for Hollywood Filmmakers to Submit Their Scripts to Approval From the Pentagon

There's no law that requires filmmakers to gain the approval of the pentagon or the ci a or submit their scripts for approval you couldn't obviously have such a law. Yet a lot of filmmakers including some of the most successful some of the biggest names in hollywood do this seeming they would great enthusiasm and gusto. What is the motivation for why big name hollywood filmmakers and producers and studios would submit their scripts and their film in general to approval from the pentagon?