Humans had finally achieved space travel, and were now colonizing other planets, and they have yet to understand that you stars were sentient, and you knew about them, because they were infesting your system next, so you landed on their home planet, demanding them to stop, and that they are currently an invasive species, they responded with hostility, and now you are guarding every other system, but humans have landed on E-5828, and you are tasked with making them leave.