Disquiet Gods Chapter 27 Question

Spoilers through Chapter 27 of Disquiet Gods

In chapter 19 a Cielcin worldship arrived and blew up the imperial ship in orbit, beginning the final phase of the extra/cielcin operation to take the dig site and awaken the Watcher.

I am now in chapter 27 and the plan has shifted to Hadrian and his xeno entourage of birdos and pales awaiting delivery of emps to try to take down the watcher.

Perhaps this is just a RAFO, but I'm very confused about what happened to that worldship. The cielcin seem to be in retreat when they are not getting stomped out by the hangry eldritch being. But aren't there many millions or even billions of cielcin on each worldship? I don't understand how that threat was neutralized. They should have virtually infinite resupply and firepower from that ship.