Timeline of the Warhammer 40,000 Universe - Nova Terra Interregnum (ca. Mid M34 - Late M35): The Nova Terra Interregnum is also known as the Time of the Twin Empires and was a troubled period in Imperial history when the Imperium of Man fractured for a time into warring factions for over 900 standard years during the mid-34th through the late-35th Millennium. During this period the rebellious Ur-Council of Nova Terra dismissed the authority of the High Lords of Terra and claimed separate rule over the Imperium's Segmentum Pacificus.During the dark days of the Nova Terra Interregnum, division and civil war fractured the Imperium into a number of different warring factions. The Adeptus Mechanicus was also affected during the Interregnum by division and internal warfare brought about by doctrinal differences and competing centres of power. One of the most discordant of these conflicts was the Moirae Schism which occurred sometime in the 35th Millennium, a dogmatic battle between the Martian orthodoxy of the standard Cult Mechanicus and a far more radical creed based upon the prophetic writings of a triad of tech-mystics from the minor Forge World of Moirae.The Moirae Schism was one of the most divisive and widespread doctrinal conflicts to afflict the Adeptus Mechanicus since the Horus Heresy. Moirae was eventually reduced to a cinder by the fabricator-general of Mars' rectification fleet, but not before heretical writings from that world spread like wildfire throughout the Priesthood of Mars, the Titan Legions and several Space Marine Chapters with close ties to Mars, such as the Iron Hands. Over 2,000 Terran years of bloody strife passed before the baleful doctrine was finally considered purged from the Mechanicus and its allies.After almost a millennium of low-grade civil war and political maneuvering, the Cataclysm of Souls in 975.M35 reunited the Imperium. In that year, the Ecclesiarchy tried to transform the Imperium into a formal theocracy where political differences would be submerged by usurping the power of the rest of the High Lords of Terra beneath the de facto dictatorship of the ecclesiarch. Their efforts ended only in stirring up massive religious civil wars against the Ur-Council of Nova Terra who were denounced as Heretics who stood in defiance of the will of the God-Emperor when they rejected the Ecclesiarchy's attempts to increase its power over the Imperial state.This religious rebellion on many worlds of the Segmentum Pacificus ultimately overthrew the Ur-Council and restored the rule of the High Lords over the entirety of the Imperium's territory, though billions died in these religious wars and the power of the Ecclesiarchy was increased throughout the Imperium to a dangerous level as a result.In 980.M35 the galaxy suffered from the onslaught of the massive Hrud Rising.In 991.M35, the 21st Founding of the Adeptus Astartes, later known as the Cursed Founding, was raised. This was the largest Founding of Space Marine Chapters since the Second Founding following the Horus Heresy. It took place shortly before the start of the Age of Apostasy.Upon the world of Inculaba, a secret geno-lab was the site of the secret project known as "Homo Sapiens Novus," where Mechanicus Genetors attempted to perfect and remove the existing, identified deficiencies in flawed Astartes gene-seed, and ultimately begin the production of new and improved primarch-like Space Marines. But their project was doomed to failure as the Genetors proved far less skilled in the genetic sciences than the Emperor of Mankind and His ancient scientists of the Biotechnical Division. Instead, their efforts resulted in the development of seriously flawed gene-seed that was used to craft the organ implants for the new Chapters.Worse still, some of these Chapters later developed unexpected genetic idiosyncrasies, mutations that strained the tolerance of the Inquisition and threatened the Chapters' survival. The most seriously afflicted Chapters suffered the wrath of the Grey Knights after they were called in by the Inquisition to expunge the threat. Some escaped this fate and fled, eventually turning Traitor and swearing themselves to the service of Chaos.In 104.M36 the War of Recovery unfolded when patchy reports of technological wonders on the planets of the Mortuam Chain reached Mars. Hoping that it might be possible to recover new STC database fragments believed to exist in the region, the Adeptus Mechanicus launched an expedition which began an escalating war that lasted for over a standard century. Aided by the advanced weaponry they recovered, the forces of the Mechanicus freed the Human colonies of the region from xenos occupation and several first generation copies of STC databases concerning certain technologies were returned in triumph to Mars.