In this episode of Mysteries of UFOs, we revisit the dramatic Battle of Los Angeles—a night when fear, war, and mystery collided over California's skies. On February 24–25, 1942, air raid sirens blared and anti-aircraft guns opened fire as the U.S. military responded to an unidentified object detected over the Pacific coast. For over an hour, thousands of shells lit up the night sky while residents watched a glowing craft drift through converging searchlights, apparently impervious to gunfire.

The military initially claimed it was a false alarm, possibly triggered by a weather balloon, but eyewitnesses described solid, luminous objects moving intelligently. No enemy aircraft, debris, or wreckage were ever found. Later government reports called it "war nerves," yet the event remains one of the earliest and best-documented UFO mass sightings in American history.

The Battle of Los Angeles continues to fuel debate—was it a case of mass hysteria, secret military testing, or an early encounter with something beyond human technology? Whatever the truth, that night Los Angeles quite literally went to war with the unknown.