Bael'dun Keep is the fortress that overlooks the Bael Modan digsite in the southern Barrens. It is inhabited by a force of dwarves that are hostile to Horde players. Gann Stonespire and Feegly the Exiled give out quests to raid the stronghold, which is ruled by the cunning General Twinbraid.
This section concerns content exclusive to Cataclysm.
Their forces apparently took part in attacking Camp Taurajo.
Gann already upset about the loss of his tribe, helps the player along with a goblin called Weevil Slipshadow fight against it. In the final quest a dwarven artillery shell is rigged and takes down the whole fortress.