There is an Abyss Gate in Tiamaranta that takes you to Rentus Base, which is a ruined armory from an older time. It was originally discovered by the Reians, but could be used as a foothold for our advancement.

Garnon is struggling at Rentus Base against usurpers and traitors. She seems to be reaching her limits. Your assistance would be appreciated.

Get out there and see what she needs, your character.

Oh good, another soldier. I assume you've come to assist me?

We must defeat the Balaur and that traitor at the Rentus Base.

I've never even dreamed that Merops would collude with the Balaur Legion.

Helping me would improve our relations. This... is more important than you might realize. Our alliance is... unsteady, at best.

Those soldiers are fighting the Vasharti Legion to open a path to Rentus.

Fighting the Balaur isn't easy, so gather some companions before you go.

I shall be waiting for news of your victory.

1. Talk with Garnon in Cygnea.

Go to Cygnea to meet with Garnon.

Dispatch Instructor Agnes recommended a dispatch mission to Rentus Base.

Yun Emissary Garnon asked you to recapture the Rentus Base, and said it will improve relations with the Reians.