A fleet invading everyone, an empire. According to the wiki, one of four things should happen: You get to choose the specific cluster out of 5(?) options, and how it connects to the.
Stellaris Omni Playthrough L Cluster part 6 YouTube
Originally part of the regular.
Besides that it makes sense to wait.
I moved my fleet to try and take out the ships in a neighbouring system and another tempest fleet moved into the terminal egress, taking out my starport and science/consruction ships there.
