As the Emperor's fleets took to the stars during the Great Crusade after ca. 800.M30, it is thought that they carried with them the first battle-ready Land Raiders. At that time, all human forces, Space Marine Legions and Imperial Army alike, were equipped with Land Raiders, and with this awesome war machine at their command they conquered world after world until the Emperor's Imperium of Man bestrode the galaxy. Such was the demand for Land Raiders during the Great Crusade that an entire Forge World was founded just to manufacture them. This world, Anvilus IX, supplied thousands upon thousands of the vehicles to Mankind's forces, but the Great Crusade ended in disaster when the Warmaster Horus rebelled against the Emperor and bloody civil war engulfed the Imperium. Anvilus IX itself was c