IncidentBattle of Los Angeles (24–25 February 1942)

In the early morning hours of 25 February 1942, less than three months after the Pearl Harbor attack and one day after a Japanese submarine had shelled the Ellwood oil installation north of Santa Barbara, Los Angeles air defense sirens activated. Between approximately 03:00 and 04:14 local time, U.S. Army Coast Artillery Corps anti-aircraft batteries deployed around the city fired approximately 1,400 rounds of 12.8-pound (.50 cal. and 3-inch) shells at unidentified objects reportedly visible over the city. The blackout was lifted at 07:21. Five civilians died — three of cardiac events attributed to the barrage, two in a traffic incident in the blackout — and significant property damage was caused by unexploded ordnance falling back over the city.

The following morning, the Los Angeles Times ran a front-page photograph showing multiple searchlight beams converging on a small luminous object above the city. The photograph — credited to staff photographer (uncredited at the time, identified in later reprints) — became one of the most-cited “early UFO” images of the 20th century. The image has been the subject of decades of analysis; later digital re-examinations of the original negative indicate substantial darkroom retouching, with the central luminous shape enhanced for print reproducibility, though the photograph is undoubtedly of the actual event rather than a fabrication.

The U.S. Army’s initial assessment, issued by Secretary of War Henry Stimson on 25 February 1942, attributed the activity to as many as 15 enemy aircraft. The Navy’s contemporaneous assessment, issued by Secretary of the Navy Frank Knox the same day, attributed it to a “false alarm” caused by “war nerves.” Neither was formally consistent with the other. The Office of Air Force History’s official 1983 volume The Army Air Forces in World War II, Volume I, attributed the incident to a weather balloon released for an upper-air observation at 03:00 — the timing of the first reported visual contact — combined with the psychological aftermath of the Ellwood shelling and a series of cascading misidentifications by ground observers.

Whether the weather-balloon explanation accounts for the full 75-minute duration of the barrage and the multiple-witness reports of structured objects is part of the case’s continuing literature. What is documented: a real anti-aircraft barrage, a real photograph, real civilian deaths, and three successive official explanations across two services and forty years, none of which is fully consistent with the others. The Battle of Los Angeles is the founding U.S. mass-witness UAP event of the modern era; it predates Roswell by five years and Arnold by five and a half.