The barbarian tribes of Icewind Dale often raided the villages of the Ten Towns, but as autumn of 1351 DR came and the herds moved south, the tribes chose to make one massive thrust in an attempt to occupy the communities and live off slave labor from their conquered foes.
A traitor from one of the communities revealed this plan of attack to the inhabitants of Ten Towns. Drizzt Do'Urden watched the traitor and promptly informed Bruenor Battlehammer. Bruenor's friend Regis, a member of the Council of the Ten Towns, convinced his fellow councilmen to form an alliance against the threat.
The bulk of the barbarian force moved south to Bryn Shander. Once the city was occupied, the barbarians figured they could strike at leisure at the other communities. Aware of the plan, the men of Maer Dualdon hid in Termalaine. A threefold trap lay in wait at Bryn Shander for the main host of barbarians. Inside the city walls stood the combined forces of Bryn Shander, Caer-Konig, and Caer-Dineval, armed with bows and hot oil. Outnumbered, the barbarians turned back and found the way blocked by Bruenor's dwarves. Townspeople from all three lakes surrounded the tribe and victory was secured.
The dwarf-built palace of Cassius, spokesman of Bryn Shander, was given to Regis after the battle. Designed for the Ten Towns' council meetings, it was the largest building of the Ten Towns and the grandest north of Mirabar. Regis promptly filled it with clutter from the front hall staircase to the master bedroom. During this battle Bruenor captured the young tribesman Wulfgar whom he raised.