The Garlean forces never really make it out of the Sylphlands due in part because of the player character. We know they at least got far enough to setup Castrum Oriens, but other than a single quest that has you go out and kill a few spies this place is never mentioned and it's completely inaccessible. They do still have a fairly strong presence in the Sylphlands however, with a small area filled with nothing but Ochu and Garlean troops, and at least 2-3 fates in the area involving them.
With Gyr Abania right on the other side of the East Shroud, I don't think they will be letting up anytime soon since they can pretty much send endless amounts of troops from Ala Mhigo through there.
With Gyr Abania right on the other side of the East Shroud, I don't think they will be letting up anytime soon since they can pretty much send endless amounts of troops from Ala Mhigo through there.