The Invaders came from outside the Earth. They came at first in cylinders that slammed into the rural areas around England, Austria, Spain and the United States. Quickly following the cylinders however were saucers manned by the Grays. The Overlords soon began assembling their tripod fighting machines and there was war that spanned the planet. This war was different for the Great Powers because the war was not for territory or resources but for the very survival of the human race.