Are you implying to do things the batarian way? (for those who don't know: In mass effect 1, there is a DLC where a group of aliens called Batarians, try to drop an asteroid twice the size the one who killed dinosaurs on an human-colony because they are angry) If anything I was thinking of Starship Troopers or The Expanse. ME works too though. Though, given they presumably want to keep the Earth, maybe they should start off with slightly smaller rocks here...
