A object flying over wartime Los Angeles triggers a massive anti-aircraft barrage, ultimately killing 3 civilians. Initially the target of the aerial barrage is thought to be an attacking force from Japan, but it is later suggested to be imaginary and a case of “war nerves”, a lost weather balloon, a blimp, a Japanese fire balloon, or even an extraterrestrial craft. The true nature of the object or objects remains unknown to this day, but the event is known as the Battle of Los Angeles.