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The Vitruvian Man of Leonardo da Vinci, ca. 500.M2

The Age of Terra, also sometimes called the "Age of Progress" in older Imperial texts, is the era of Human history between the 1st and 15th Millennia (1 - 14,999 AD).

This is the era when Mankind advanced from a pre-industrial Iron Age culture to become a star-spanning Fusion Age civilisation.


The original reason for numbering the years from the start of this era is because it was believed to be the year of the birth of the ancient religious leader Jesus of Nazareth, which has long been forgotten by Humanity. Mankind now possesses only one religion -- a deep faith in the God-Emperor of Mankind and His Imperial Cult.

During the long years of the Age of Terra, Humanity came to dominate the Earth culturally and technologically. Myriad Human civilisations came and went during this long span of now mostly lost Human history.

The first three Chaos Gods -- Khorne, Tzeentch and Nurgle -- were birthed in the Immaterium in this era, all coming into existence at various points during Old Earth's European medieval period.

Their emergence at this time was the result of the constant warfare, the growth of sophisticated early modern nation-states and continued outbreaks of global plagues, respectively, which marked that era and fed the final formation of the Dark Gods' consciousnesses.

The Sol System was ultimately colonised once Humanity developed the necessary technology to leave the Earth's orbit in the late 2nd Millennium and the early 3rd Millennium. Mankind first colonised Mars and lived on the moons of Jupiter, Saturn and Neptune.

Mars became the first planet to be terraformed by Humans when it was settled by various industrial cartels. The Red Planet soon became synonymous with technical expertise and scientific advancement, a characteristic that would mark it for many millennia to come.

Advanced nuclear fusion and anti-matter propulsion technology was developed that eventually allowed Humanity to construct interstellar starships that could colonise other star systems, though the slow travel times of these vessels meant these Human colonies had to be self-sufficient to survive, as no aid could arrive from Earth in time.

At the end of the period and stretching into the next era in Human history, the Age of Technology, Humanity began to colonise the stars using these sub-light spacecraft.

At first only nearby star systems could be reached and the Human colonies established on them were required to survive as independent states since they were separated from Old Earth by up to ten Human generations' time of travel.

Almost nothing of this period's events is known to current Imperial historitors save as myth and legend, though it is clear that the Emperor was alive and on Earth throughout this era.

He is believed to have been born in the 8th Millennium B.C. in Anatolia, then disguised His true abilities and immortal Perpetual nature as He moved from identity to identity throughout Old Earth's ancient history. In every guise, He always sought to better the lot of Humanity, physically, intellectually and spiritually.



  • Galaxy in Flames (Novel) by Ben Counter, pg. 280
  • Realm of Chaos: The Lost and the Damned (1st Edition), pp. 174, 176
  • Warhammer 40,000: Rulebook (8th Edition), pg. 40
  • Warhammer 40,000: Rulebook (5th Edition), pg. 122
Warhammer 40,000 Timeline
Pre-Imperial Eras War in HeavenAge of TerraAge of TechnologyAge of StrifeFall of the Aeldari
Founding of the Imperium Unification WarsGreat CrusadeHorus HeresyGreat Scouring
Age of the Imperium Time of RebirthThe ForgingNova Terra InterregnumAge of ApostasyAge of RedemptionThe WaningTime of EndingEra Indomitus
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Warhammer 40,000 Overview Grim Dark Lore Teaser TrailerPart 1: ExodusPart 2: The Golden AgePart 3: Old NightPart 4: Rise of the EmperorPart 5: UnityPart 6: Lords of MarsPart 7: The Machine GodPart 8: ImperiumPart 9: The Fall of the AeldariPart 10: Gods and DaemonsPart 11: Great Crusade BeginsPart 12: The Son of StrifePart 13: Lost and FoundPart 14: A Thousand SonsPart 15: Bearer of the WordPart 16: The Perfect CityPart 17: Triumph at UllanorPart 18: Return to TerraPart 19: Council of NikaeaPart 20: Serpent in the GardenPart 21: Horus FallingPart 22: TraitorsPart 23: Folly of MagnusPart 24: Dark GambitsPart 25: HeresyPart 26: Flight of the EisensteinPart 27: MassacrePart 28: Requiem for a DreamPart 29: The SiegePart 30: Imperium InvictusPart 31: The Age of RebirthPart 32: The Rise of AbaddonPart 33: Saints and BeastsPart 34: InterregnumPart 35: Age of ApostasyPart 36: The Great DevourerPart 37: The Time of EndingPart 38: The 13th Black CrusadePart 39: ResurrectionPart 40: Indomitus