Kossar
From Warhammer - The Old World - Lexicanum
Kossars are a unit in the Kislev Bestiary. They were an Ungol tribe who worked as mercenaries, fighting with the Gospodars against the Ungols and had adopted a unique style of fighting, that of axe and bow. They went on to teach the Gospodars these tactics and now exsist as a mixed unit of Ungol and Gospodar soldiers. They are kept by the Tzar/Tzarina as a standing Kislev force and are well trained, meeting the enemy both at range and in combat.