Quote Originally Posted by Astralia View Post
I'm actually on a second run of the msq, but it seemed to me indeed the Vanguard had been achieved after the dome appeared, and after Zoraal Ja and his ships came out of the dome, it only came to me: why was there a need to build the Vanguard at all. Because except maintaining contact between two worlds (since I think the contact Sphene made between the two is unstable), and the time sync... but I don't think they're that aware of the time sync between the worlds... besides with their large ships, they have every means to attack us with large troops and go back to their world already, therefore I see no reasons why they would need to build the Vanguard.

It's actually us who would have had a need of building a way to cross the dome
Vanguard was built to breach the dome. That's the whole point. In the hallway after the second boss you can see it's a tunnel between the dome and the outside. Without it, you'd be fried by the lightning. And it's a resupply base for the airships and drones, hence the name "Vanguard".