The Battle of Los Angeles refers to an incident that occurred on the night of February 24-25, 1942, during World War II. Following reports of unidentified flying objects over the city, the U.S. military activated air raid sirens and fired anti-aircraft artillery into the sky, believing they were under attack by Japanese forces. Despite the extensive gunfire, no enemy aircraft were found, leading to confusion and speculation. The event was later attributed to a combination of war nerves, weather balloons, and misidentifications, but it remains a notable moment in American military history and UFO lore.