Subtitle Battle | Los Angeles

: 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 .

: The invaders are bio-mechanical beings that attack coastal cities to harvest Earth's water for fuel . The Real-Life "Battle of Los Angeles" subtitle Battle Los Angeles

: No enemy aircraft were ever found. The military later attributed the event to a "false alarm" caused by a lost weather balloon and "war nerves" . : The filmmakers focused on tactical realism, putting

The movie's title and early marketing were inspired by a real historical event from . The military later attributed the event to a

: 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 incident remains a favorite topic for UFO theorists, who speculate the objects were actually extraterrestrial craft—a theory the 2011 film uses as its core premise . "Mockbuster" Confusion