At 11:00 AM on April 6, 1966, during morning recess at Westall High School in Clayton South, Melbourne, 200+ students and teachers witnessed one to three silver-grey metallic disc-shaped objects with domed tops — each approximately twice the size of a family car — hovering over the school grounds, descending into the nearby Grange bushland, and then accelerating away. Within 20-40 minutes, military personnel, police, fire brigades, and men in dark suits arrived. A school assembly was called. The headmaster told students they would be “severely punished” if they spoke about what they had seen. Teacher Andrew Greenwood, who had photographed the object, had his camera confiscated by a military officer and was told he would lose his job if he spoke out. A female student who got close to the craft was taken away in an ambulance and never returned to school. The field where the objects landed was burned by the landowner to deter trespassers. No RAAF aircraft, no commercial pilots, and no military personnel reported any unusual activity that day. Zero official records exist in any RAAF or government file. Researcher Bill Chalker reviewed all RAAF DOD UAP files in Canberra in 1984 — no Westall file. Ross Coulthart (7NEWS Spotlight 2021) claimed a Department of Supply report on the incident exists but is suppressed. Thousands of unopened Department of Supply files remain in the NAA. Westall is now included in Australia’s national history curriculum as a lesson in critical analysis.