To their eternal shame, the Titan Legions bear the stain of disloyalty to the Emperor like so many other branches of the Imperial armed forces. Like the Legio Astartes, many of the Titan Legions also sided with Horus against the Emperor during the dark days of the Horus Heresy and eventually fled to the dark refuge known as the Eye of Terror when their master was defeated. Within the Forces of Chaos, the dreaded Chaotic Warhound-class Titans, reclassified as Feral-class Titans by the Imperium, have seen millennia of service in the Traitor Titan Legions’ pursuit of the Long War against the Imperium of Man, becoming utterly corrupted by the daemonic powers of the Warp and the fickle favour granted to these vile war machines by the Ruinous Powers. Many of these dreaded war machines easily date back to long before the Horus Heresy and have had their Machine Spirits wholly corrupted and possessed by the Warp-touched powers of Chaos. The Titan’s Machine Spirit and its damned crew become possessed by daemons and are doomed to serve the will of the Chaos Gods in battle for all eternity.