The Fire Hawks were one of the Loyalist Space Marine Chapters created in the 36th Millennium during the Cursed 21st Founding. While the Fire Hawks have always maintained they were forged from the genestock of the Ultramarines, the sons of Roboute Guilliman have never acknowledged any kinship, fueling suspicions as to their true heritage. They have the dubious distinction of being one of the few Chapters of the Adeptus Astartes to have lost not one but two Chapter homeworlds. After being nearly driven to extinction during the Badab War, the Fire Hawks' mobile Fortress-Monastery, the ancient Void Fortress Raptorus Rex, was lost in the Warp in 963.M41. It is now believed that the survivors of this disaster became the cursed Astartes known collectively as the Legion of the Damned.