Horus was thus the first Primarch to be rediscovered by the Emperor after the Great Crusade began in the early 31st Millennium.

Horus' homeworld was the Hive World of Cthonia which lay only a few light years from Terra. Horus was the Primarch of the Luna Wolves Legion of Space Marines (later renamed the Sons of Horus), the first Imperial Warmaster, the most favoured son of the Emperor of Mankind, and ultimately, the greatest Traitor in the history of Mankind. Horus Lupercal, also known more simply as the Lupercal during his lifetime by the Astartes of his Luna Wolves Legion, was one of the 20 genetically-engineered Space Marine Primarchs created by the Emperor of Mankind from the foundation of his own DNA before the start of the Great Crusade to lead the armies of the newborn Imperium of Man. Horus was the exception.' ‐ Kyril Sindermann, Preface to the Remembrancers It is a universal truth and an unavoidable law that cannot be denied, despite the protestations of the vain, the arrogant and the tyrannical. No man lives forever and even as memory fades, so too will any remembrance of him. Unnumbered civilisations before ours are naught but dust and bones, and the greatest heroes of their age are forgotten legends. But if the remembrance of history has taught us anything, it is that, in time, all things will pass. It is an insulating conceit a powerful man might clasp tight to his bosom that he might sleep away the night, safe in the knowledge that, but for his presence, the world would not turn, the mountains would crumble and the seas dry up. Summary 'It is the folly of men to believe that they are great players on the stage of history, that their actions might affect the grand procession that is the passage of time.

Emperor of mankind vs horus