Chemos - Arrival of the Emperor: In his spartan quarters in a tower at the heart of the greatest city on the planet, Fulgrim was faced by armoured warriors from the stars. Their faces bore the scars of many battles, and from their shoulders hung scrolls listing their achievements. Their armour and weapons were finely-worked, and their banners and pennants were works of art. Fulgrim recognised that these men were not merely more advanced than the people of Chemos, but truly civilised -- his lost brothers from the stars had preserved the arts he had longed to return to Chemos. From the midst of these warriors stepped their leader, the Emperor of Humanity. Fulgrim surveyed him and, without a word, knelt and offered his sword. On that day Fulgrim swore to serve the Imperium with all his heart.From the Emperor Himself, Fulgrim learned of Terra, of the Great Crusade to reclaim the galaxy, and of his own origins. Though the story was fantastical in nature, he knew it to be true, and at the Emperor's request Fulgrim travelled to Terra to join the Space Marine Legion that had been created from his genetic material.Unlike the other Legions fighting in the Crusade, the Astartes of the IIIrd Legion were few in number -- an accident had destroyed nearly all of the Legion's precious gene-seed during transit from Luna to Terra and the reserves had been corrupted by a terrible infection.With the primarch himself lost, the rebuilding of the Legion's gene-seed had proven to be a slow and difficult process. Fulgrim addressed the two hundred warriors who were then all that the IIIrd Legion could muster. There were so few that each of them bore a banner of a company of the Legion that had either perished, or now numbered only a handful of warriors.Yet they were unbowed and stood with pride, as if in defiance of fate. The Primarch may have seen an echo of the struggle of Chemos in his remaining gene-sons. To them he gave the sacred task of bringing the Emperor's wisdom to all the stars in the sky, "You are the Emperor's chosen, his heralds, his warriors, his children, for this is only the beginning," the Book of Primarchs relates he told them upon their first meeting.On hearing of Fulgrim's words, the Emperor renamed the IIIrd Legion the "Emperor's Children," ratifying a name long known within the Legion since their defence of the Master of Mankind during the Proximan Betrayal early in the Great Crusade but now given the full legal force of Imperial decree. The Officio Militaris' College of Arms recorded the change and marked the III Legion's panoply as imperial purple with the talon-spur as their emblem and the unique right to bear the Aquila Palatine as executors of the Imperial will, an honour given to the Emperor's Children alone among the Space Marines until after the betrayal of the Horus Heresy.Fulgrim was anxious to begin his conquest of the unknown regions of the galaxy as part of the ongoing Great Crusade, but realised that his two hundred warriors were far too few to undertake the Crusade on their own. With the Emperor's blessing Fulgrim and his IIIrd Legion joined the Luna Wolves on campaign, and Fulgrim fought side-by-side with his brother Primarch Horus, aiding him in his newly-assigned task of pacifying the Eastern Fringe of the galaxy. The Warmaster himself soon praised Fulgrim and his Legion, declaring them the living embodiment of the everything the Legiones Astartes aspired to be.