The Saint-Dizier Military Base Light Formation

On the evening of August 20, 1978, at 22:50, five military personnel stationed at a French air base in Saint-Dizier witnessed unusual aerial lights performing erratic maneuvers. The primary witness, a military sergeant (T1), initially observed three lights described as "the size of ping-pong balls" moving from east to west while changing positions relative to each other and turning orange in color. He called a second serviceman (T2) from the first floor of a building, though this witness observed only a single light. The two witnesses then moved to the aircraft parking area where they were joined by three additional military personnel (conscripts). All five witnesses then observed what appeared to be a single luminous point performing silent, irregular maneuvers including movements, stops, zigzags, and backward motion at variable speeds. The phenomenon eventually disappeared toward the north, gradually losing luminous intensity. The observation occurred on a Sunday evening in mid-August on a military airbase. The case was originally classified as 'D' (unexplained) by GEIPAN but was reclassified to 'C' (insufficient reliable data) upon reexamination using modern analytical techniques. The reclassification was prompted by significant concerns about witness reliability and data consistency. GEIPAN investigators noted evidence of inter-witness influence, with all five witnesses using the identical phrase "gros comme une balle de ping-pong" (big as a ping-pong ball) to describe the phenomenon. The hierarchical military context raised questions about whether subordinate witnesses (conscripts) felt pressured to conform to the account of their superior (the sergeant). Two witnesses (T2 and T5) spontaneously stated they would not have noticed anything if T1 hadn't pointed it out—an unusual confession in GEIPAN records. Additionally, witness T4 admitted delaying his testimony because he "feared being taken for a joker," despite knowing three others, including a superior, had already testified. The most plausible explanation explored by GEIPAN investigators was a skytracer or similar festive light beam projecting onto cloud cover, creating luminous spots in the night sky. This hypothesis accounts for several observed characteristics: the three colored lights merging into one, erratic zigzag movements, periods of immobility, and apparent non-zero diameter. The timing (Sunday evening in August) suggested possible festive activity within a 10-20 km radius. However, several factors weaken this hypothesis: skytracers were rare in the 1970s; no records of nightclubs using such equipment were found 40 years later; and witnesses described luminosity exceeding that of stars, whereas cloud reflection typically creates dimmer halos. The case remains unidentified due to insufficient reliable data rather than genuinely unexplained phenomena.