Rantor

"The King sends out for young, promising boys and spends their entire youth training them.  Then he outfits them in full plate mail, with mattocks and shortswords, and with Dwarven runes to bless their movement.  Those companies are backed with clerics and wizards, and are sent off to recapture strategic points from the Rantor."

-- Sir Jekob Tull, Overcaptain of the Capital Guard

The Rantor, or Beetlekin, are most closely described as an upright Scarab. They burrow underneath the mountains and make their homes in massive colony-holes with architecture that rivals the Dwarves. Fierce and territorial, they are no friend to any known race and are known to treat trespassers with little kindness. Those Rantors raised underneath the mountains are likely to meet death at an early age, as they constantly feud with one another in unending civil wars.

Fractured Society
The compulsion of the Rantor is glory, and at the individual level, it means that every other living creature is an obstacle to that glory. Rantor society is rife with feuds, with gangs, and with the seasonal rising and falling of great Warlords. One's allegiance is only to that which one fears or respects, and only if that fear or respect does not fade. The sprawling colonies of the Rantor do not have central leadership or governance - they move and operate only at the heed of family patriarchs or local strongmen. Occasionally a group will become influential enough to wield the name Warlord and for there to be sufficient weight behind it. To wield that name is to issue a challenge of strength to all other Rantor - to dispute their equal claim to glory. It is only with great cunning and strength does one don that name and live to see the next days afterwords.