Nha Trang Vietnam — Military Base UAP Mass Sighting 1966

On the evening of February 20, 1966, a brilliant luminous orb appeared over the US military logistics base at Nha Trang, South Vietnam. Hundreds of US military personnel — Army, Navy, and Air Force — observed the object hovering at what was estimated to be approximately 1,000 feet before performing a vertical ascent to extreme altitude and departing at high speed. During the object's presence over the base, multiple vehicle engines on the base stalled and stopped — only restarting after the object departed. Gasoline-powered generators also stopped. The mass observation included not only US military personnel but Vietnamese civilian workers on the base. Several witness accounts were formally recorded by US Army intelligence officers. The electromagnetic interference component — multiple simultaneous engine stoppages — combined with the hundreds of independent military witnesses in a combat zone (where observers have heightened situational awareness and lower tolerance for misidentification) made this one of the most significant Vietnam-era military UAP events. The case was among those later cited in analyses of the electromagnetic effects associated with UAP observations.