NATO Exercise Mainbrace UFO Sightings
In the fall of 1952, NATO staged a series of military exercises from the Arctic Circle to the Mediterranean Sea. Operation Mainbrace (also known as Exercise Mainbrace) was one such large-scale exercise that took place from September 14-25, 1952. Starting on September 13, 1952, numerous unidentified aerial objects were reported by military personnel from different countries, in different locations across Northern Europe. In all, five plus credible UFO sightings were witnessed by NATO troops during the exercises.