Penned by several authors, the series takes place during the Horus Heresy, A tabletop game that can be played in Warhammer The Horus Heresy or the models can be used in the Warhammer 40K Tabletop game a fictional galaxy-spanning civil war occurring in the 31st millenium, 10,000 years before the main setting of Warhammer 40,000. The war is described as a major contributing factor to the game's dystopian environment.
