Communist Aliens from SPACE!
They came in super technologically-advanced spaceships. They had traveled a bagillion space miles, or light-years or whatever. They came to do all the typical alien things that humans (at least the ones in the USA) are afraid of extraterrestrials doing. They wanted to introduce a huge multi-functional monarchy that ran on a communistic economic system that didn't benefit the rich or men...just the aliens. The space kind, not the foreign kind. It was a nightmare. And the demons of Earth were of no help. They didn't want to get involved in the affairs of humanity. Or at least, they were waiting for Ms. Kills-A-Lot to give them the go ahead. But she couldn't because she herself was mostly dying shortly after the invasion took place because the aliens were also quite good at wholesale slaughter. The aliens blasted up the entire planet. Indiscriminately, really. They were killing humans in a very evens-Stevens sort of way. At least, that's what all the other countries claime...