The Story

Shadows of Argus
After the events of Antorus which led to the defeat of Argus the Unmaker and the ultimate imprisonment of Sargeras within the Seat of the Pantheon; the Legion has become a nonentity, it's forces scattered and the surviving demon lords now seeking to establish their own organizations as they war with each other for dominance, it was then that the Hellwrath Vanguard was established to reunite the remaining demons under one banner and succeed where their darkened master could not.

Establishment of the Vanguard
The two demon commanders, Behamahl and Kathulon sought to restore the legion to their former glory by rallying the surviving demons scattered across the Twisting Nether into the Hellwrath Vanguard, they're now gathered in Hellwrath Fortress located on a conquered world within the Twisting Nether.