events

The treason of Fabricator-General Kelbor-Hal, who pledged Mars to Warmaster Horus and unsealed the Vaults of Moravec, igniting the Schism of Mars and giving birth to the Dark Mechanicum.

The compact between the Emperor of Mankind and the Mechanicum that bound the two estates and recognised the Omnissiah-Emperor identification — the political founding of the Imperium's Mechanicus arm.