Subtitle Battle Los Angeles «SIMPLE SECRETS»

The movie's title and early marketing were inspired by a real historical event from .

: The filmmakers focused on tactical realism, putting actors through a three-week Marine boot camp and using handheld "shaky cam" techniques to mimic real combat footage . subtitle Battle Los Angeles

: Just months after Pearl Harbor, jitters over a Japanese attack led U.S. forces to fire over 1,400 anti-aircraft shells at unidentified objects in the sky over Los Angeles . The movie's title and early marketing were inspired