Historians and UFO enthusiasts are debating whether unusual aerial phenomena described in the ancient Vietnamese chronicle Đại Việt sử ký toàn thư could represent early UFO sightings. Several passages mention mysterious lights and strange objects appearing in the sky, which some modern readers interpret as unidentified flying objects.

Scholars, however, caution that such records were often written using symbolic or spiritual language common in medieval history, frequently linked to omens or natural celestial events like comets, meteors, or atmospheric phenomena.

While the theory has sparked public curiosity, experts stress that there is no scientific evidence connecting the historical accounts to extraterrestrial activity, and the descriptions are more likely reflections of cultural beliefs and astronomical observations of the time.