Editing Setting:Transformers (section)

===M30:===
*'''950-996.M30 The Great Loss''': Unexpectedly and horrendously, the Great Crusade sweeps through most of the major Transformer colonies and territories. The path of fire the Emperor's Astartes leave behind razes the surprised Cybertronian worlds to the ground, archives and artifacts dating back to the Great War now lost forever. Whatever precious few items and information not collected by fleeing Transformers are either destroyed or collected by the Adeptus Mechanicus for study. The Thousand Sons Legion, however, is rumoured to have collected and preserved many of the archives in secret on the orders of Primarch Magnus the Red himself. How many of these Cybertronian artifacts that survived the Burning of Prospero is uncertain. The Emperor himself is unusually keen on seeing the extermination of the Transformers through, and it seems he at least had some beforehand knowledge of their technology and tactics.

*'''997.M30 The Fall of Cybertron''': With the mighty God Emperor himself at the helm, they and a strike force of Iron Warriors, Dark Angels, Iron Hands, their respective Primarchs, and a Titan Legion make planetfall on the Transformers' ancient home world of Cybertron. A call is made out to the rest of the galaxy by the panicking defenders for help of any kind. Within eight hours of the call, a whole armada suddenly arrives in orbit via Transwarp travel. But what surprises most is that the Decepticon and Autobot insignias of old are standing side-by-side, their eternal rivalry at least momentarily forgotten for the sake of their home world. Soon the legendary Optimus Prime of the Autobots and the infamous Megatron of the Decepticons join their brothers on the ground in the fight against the Astartes. 

:What follows is utter carnage that will only be dwarfed by the Ullanor Crusade a few years later. The battle goes over the course of a few months, the tide of war switching back and forth constantly between Imperial and Cybertronian, reinforcements arriving for both sides on several occasions. All the while Optimus and Megatron are in the fray, leading their fellow Transformers. At one point Megatron even engages in close combat with Ferrus Manus, who was forced to retreat as even he could not withstand the blows of his Dark Energon Mace without suffering irrevocable damage. 

:The battle reaches its climax at the ancient area floors of the former Decepticon capital of Kaon. The Emperor of Mankind strategically isolates Megatron and Optimus from their respective forces and engages them in single combat. What happens next is debated by multiple sources. Ancient Imperial scriptures say that the Emperor smoke both Xenos singlehandedly and the Transformer forces crumbled soon after. The Autobots remember the battle going in the favour of Megatron and Optimus, but Megatron abandoned Prime to the mercy of the Emperor. The Decepticons, however, say the opposite, that Optimus bailed out on his former brother and the fight was lost from there. Whatever the outcome, the Transformers were soon routed from Kaon and the bulk of their armies were forced to evacuate from their home world. With heavy Sparks, the second-in-commands of the Transformers forces, Ultra Magnus and Starscream, ordered the troops on the ground to overtax the Kaon space bridge, causing a chain reaction of other bridges all over the planet activating and beginning to swallow Cybertron in a Transwarp portal. Miraculously, the majority of the Astartes forces were able to escape the vanishing planet before it was sucked into the wormhole. From this point on, both the Autobots and Decepticons lost any singular leadership they had and their rivalry reached its highest peak since the Great War. Many of the Cybertronian forces are too scattered and weak to participate in the Horus Heresy. Amongst the Autobots who fought at Kaon, only one survivor is known; Hot Rod, who returns traumatized and bearing the Matrix of Leadership. It is unknown if Optimus Prime or Megatron survived the Fall of Cybertron, as their bodies were never recovered and sightings of them persist into the 41st millennium.