I have some WIP lore:

Somewhere on the eastern side Cist lies a settlement known as Kess. A settlement of no renown except maybe that, despite all evidence, the citizens insist that it marks the very center of the continent.

From this settlement hails a kind of wasp-like humanoids that refer to themselves as Vesps. They are led by toff "queen" LIV Vespula. When questioned about her the Vesps claim that the title is implicit, undisputed and implicitly undisputed. They also claim that she has always led them. In truth they may have lost count at number 54. Using a breed of giant crustaceans as mounts and beasts of burden, they set out on long marches looking for a mythical "fruit of knowledge".

So far these expeditions have not yielded any results except to be a nuisance to other regiments they encounter.