The invasion hypothesis is the theory that UFOs are the reconnaissance force of an extraterrestrial army which plans to invade Earth. One of the leading proponents of this theory is retired Hungarian army major Colman Von Keviczky, Director of the Intercontinental Galactic Spacecraft (UFO) Research and Analytical Network (ICUFON). Von Keviczky contends that the strategic military locations of many UFO sightings provide an indication of the hostile intentions of UFOs.
This has been a recurring theme in many works of Science Fiction from the early writers of H.G. Wells to more modern movies like Independence Day.