Anvilrage

Anvilrage is the name of the Dark Iron dwarven legion that lives in the Blackrock Mountain and Blackrock Depths. The army is led by General Angerforge, and are named after Anvilrage, who was one of the most powerful generals in Blackrock Depths. Anvilrage's flaming anvil insignia is visible on tabards and shields beneath Blackrock to this day. While he no longer lives to command the Dark Iron army, many soldiers still bear his name.

World of Warcraft
The Anvilrage are led and trained by General Angerforge in the West Garrison in Blackrock Depths. They form the most numerous group of the Dark Iron armies. With Dagran Thaurissan killed and his wife on the throne, it unknown if they follow Moira or not.

Cataclysm
The spirit of General Anvilrage is seen in the Athenaeum of Blackwing Descent.

Following the Cataclysm the Dark Irons and Twilight's Hammer increased their collaboration. Using the knowledge of the cult, the Dark Iron dwarves were imbuing their weapons with elemental powers, outfitting the Anvilrage legion with fearsome new weapons.

Speculation

 * The Dark Iron Army and the Anvilrage could be the same organization since both are armies led by General Angerforge.
 * The Anvilrage may also be a family rather than an army, as both Forgus Anvilrage and General Anvilrage existed.