They do not appear on the map by default, and must be awakened by the Warriors of Chaos. In order for them to be awakened, the Warriors of Chaos must win a battle against a settlement in the Mountains of Hel. It doesn't matter who currently controls the settlement.
If the Aeslings are wiped out, the Warriors of Chaos can just awaken them again by winning another battle against a settlement in the Mountains of Hel.
The Aeslings or Aes are a Norscan Tribe whose southernmost village is Skraevold, and whose territory borders the Frozen Sea. They are mortal enemies of the Baersonlings, whom they have stolen cattle from as well as having slain freeholders and thralls. The hair of the tribesmen is noted as being dyed dark crimson with the blood of their enemies, with the runes of the Blood Lord etched into each cheek and forehead of their warriors' hideously scarred faces. Indeed, Aesling warriors wear heavier armour than those of the Baersonlings, and their arms are covered in bands of steel and bronze. Most of their belts swing with the severed heads of those they kill, until they return to Skraevold to offer them up as tribute to Kharnath.
