Legio Vulcanum II
The Legio Vulcanum was originally founded sometime before the Horus Heresy on the Forge World of Stygies VIII. Located close to the Eye of Terror, Stygies VIII was rare in that it hosted two Titan Legions, Legio Vulcanum I and II. Most of both of the legions machine's were on Crusade with Horus when the Heresy began, immediately joining him. The two Legions launched an attack on Stygies VIII in cooperation with Chaos Cultists but on the verge of total victory were defeated by Eldar forces from Saim-Hann, which suddenly appeared to deny Chaos a new staging point. The two legions then accompanied Horus into the Eye of Terror.