War of the Beast - Mechanicus Standoff: As his first act as Lord Commander of the Imperium, Koorland moved to curtail the scheming of the Martian Priesthood. It had come to light that the Mechanicus were secretly experimenting with Ork teleportation technology in the hopes of teleporting the Red Planet away from the Sol System. The Tech-Priest Eldon Urquidex had knowledge of The Beast's true origins and massacred an Officio Assassinorum investigation team under the command of the Vanus Temple Assassin Clementia Yendl, which had discovered the Mechanicus' illicit experiments. Under order from the newly instilled Lord Commander Koorland, a force of Astartes from the Fists Exemplar commanded by their Chapter Master Maximus Thane, was dispatched to Mars to take Urquidex into custody. But upon landing on the surface of the Red Planet, they were confronted by a large force of Skitarii, Electro-Priests and Battle-Automata of the Legio Cybernetica under the command of the senior Artisan Argus Van Auken. The senior artisan did not wish to engage the Astartes and attempted to impede the Astartes progress with his own Skitarii forces, ordering them to leave Mars immediately. Though engaged in a terse standoff, Chapter Master Thane continued his advance upon Pavonis Mons where Urquidex was being held. He refused to let his progress be impeded, but was careful not to engage the Mechanicus forces, provoking them unnecessarily.However, despite the effort of the commanders of both sides not to engage one another, disaster struck, when an errant shot from an Onager Dunecrawler accidentally struck an incoming Fists Exemplar Drop Pod. Both sides immediately engaged one another in an intense, but thankfully brief, firefight. It was only through the supreme efforts of Fabricator-General Kubrik, who was currently on Terra, that a complete massacre was averted. Thanks to Lord Commander Koorland's impassioned speech to the Fabricator-General about unifying in the face of the nearly unstoppable greenskins menace, was the Fabricator-General finally swayed to the Imperium's cause. Kubik immediately ordered his forces on Mars to stand down. The panicked Van Auken quickly complied with the wishes of the supreme commander of the Mechanicus. The Fists Exemplar then took Urquidex into custody.The Fabricator-General then revealed to the Lord Commander the extent of the Mechanicus' experimentation with the Orks' teleportation technology, as they were able to successfully teleport the small planetoid of Phobos from one side of Mar's orbit to another. Gleaning knowledge from the now half-Servitor Urquidex, the Lord Commander learned the location of The Beast's homeworld - Ullanor - the very same world that once saw the most favoured son of the Emperor elevated to the esteemed rank of Warmaster, before his fall to Chaos. He quickly dispatched a call-to-arms across the Imperium, to gather at Terra, in order to launch an Imperial Crusade towards the fabled planet and destroy The Beast once and for all, as well as finally dealing a fatal blow to the crippled Attack Moon that remained in orbit above Terra. The Blood Angels, Dark Angels, Space Wolves and the Ultramarines all heeded the call and made their way towards the Throneworld of humanity.