Before
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AN: MASSIVE SPOILERS FOR MY CROSSOVER SERIES!
Expect this to be updated regularly and adjusted every once in awhile.
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Review!
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M0: Ancient History
10,000 BC: The last Ice Age on Terra ends and Neolithic Age begins. The Agricultural Revolution is initiated in the ancient Middle East in the region that will be called the Fertile Crescent. Humans first begin to settle in towns and give up their previous nomadic hunter-gatherer existences.
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8,000 BC - 1400 AD: Ruinous Powers within the Warp known as Nurgle the Plague Lord, Khorne the Blood God, and Tzeentch the Changer of Ways, are born in that order. This causes the once tranquil Immatrium to transform into the daemon-haunted nightmare that it is today.
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7000 BC: The Shamans of Old Earth commit suicide in a now lost ritual to merge all their souls into a single entity that will later be called the Emperor of Mankind. One young female Shaman does not participate in the ritual, believing that someone needs to ensure the newborn immortal follows His set path.
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M1: The Age of Terra, also known as the Age of Process, begins.
001.M1: Beginning of the Common Era and the starting point of the Imperial Calendar.
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284-305.M1: The future Emperor of Mankind defeats and imprisons the C'tan known as Mag'ladroth the Void Dragon, the most powerful C'tan. It still resides in stasis, theorised to be located beneath Mars in the Noctis Labyrinthus. This event is later written down in various folk tales as a warrior fighting a similar monster, likewise giving the young Emperor the nickname 'Dragon Slayer'.
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306-567.M1: The future Emperor is visited and taught by the ancient entity of Light that is later named 'The Traveler.' This being is theoretically as old as the Universe, if not older. The Traveler represents life and peace. It is one of the few being that can truly be called a god, the Emperor one such being. It has been debated for centuries why the Traveler originally came to the Emperor, however, it is without a doubt that it was under the guidance of the Traveler that the Emperor has learned of other threats from, according to today's Inquisition, without and beyond. This knowledge has allowed the Emperor to protect the nascent humanity from any threat from the stars.
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603.M1: Eir, the eldest of the living Emperor's children, is born.
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613.M1: Lady Eir's home is burned down and her mortal mother sacrificed to the Dark Gods. This is the first recorded sign of the Ruinous Powers. Lady Eir was able to save her mother's soul, using her unique soul gripping power for the first time, an ability she directly inherited from her Father. She was saved from both the flames and the powers of the Warp by her Father, the Emperor, who refused to let any of his children be taken by any Warp Entity. Lady Eir would go into hiding until her rediscovery in the 31st Millenium.
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750-900.M2: The Industrial Revolution begins in the Western regions of Terra and eventually spreads across the planet by the first decades of the 3rd Millennium. The economies of the nation-states of Terra begin to rapidly expand with the onset of industrial production and the rapid scientific discoveries that mark this period. However, the Industrial Revolution also breeds new problems for Mankind, including unequal distribution of resources, extreme environmental degradation, and rapid shifts in cultural values that lead to societal strife.
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905.M2: The Emperor finds the last Shaman of Old Earth. Upon being discovered, the Shaman first tries to flee, only to run straight into the embodiment of her kind. Realizing flight if fruitless, the Shaman destroys her body in an attempt to have her soul be reincarnated again, only for the Emperor to capture her unseen shapeless form in a complex Psychic technique that only He and individuals of similar power can achieve. The soul of the last Shaman is stored deep within the Emperor's own mind in hibernation.
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914-918.M2: The First industrialised global war known as World War I begins in the Western regions of Terra.
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939-945.M2: The Second industrialised global war, called World War II, a conflict even more devastating than the first, engulfs Terra. This has caused widespread fear of what such conflicts can do to societies should another begin, as WWII alone nearly destroyed multiple.
During this time a madman named Adolf Hitler in the ancient country known as Germany began persecuting Jews. While their religious leaders did cause trouble, the majority of the people, including men, women and children, were innocent. Thousands died painful deaths to the madman, the few survivors traumatized and near dead.
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945.M2: Detonation of the first human-developed atomic weapon. Fission-based nuclear power soon becomes widespread on Terra as do stockpiles of nuclear weapons. This period is later called the Nuclear Age
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946.M2: The first digital computer, called UNIVAC, invented by humans on Terra in the ancient city of Philadelphia of the country America.
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961.M2: First human being, Yuri Gargarin, crosses Terra's atmosphere and orbits the planet. This marks mankind's destined ascension into the stars according to Guardian belief.
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969.M2: The First Luna Landing
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971.M2: The First Space Station, called Salyut, is built
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999.M2: The Emperor releases the now empowered Shaman's soul. Later that year, a woman gave birth to a girl. The child's birth was considered a miracle since the mother was previously barren.
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M3
001.M3: Mankind's scientists complete the sequencing of the human genome, allowing for significant advances in genetic research.
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039-055.M3: After years of encouraging social rights, progress, and environmental sustainability, the amnesiac Shaman falls into the carefully laid plans of the Emperor. She disappears from humanity's eyes and is strengthened by the Emperor both physically, mentally, and spiritually. At the same time, the Emperor restores her memories of all her previous incarnations as He claims her as his. The process takes eleven years and leaves the newly reborn Empress in a coma for half as long. The event is later known as 'The Wedding of Immortals.'
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100.M3: By the end of the early 22nd Century, Mars becomes the first human colony world to be terraformed. It is given an atmosphere and its deserts are transformed into fertile soil. Mars is then settled by industrial cartels and their workforces, quickly growing into the first human Hive World in subsequent centuries.
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M5: The 5th Millennium saw much of Mankind's early sub-light interstellar expansion outside of the Sol System. It was during this millennium that the Alpha Centauri System, the closest star system to Earth's own, was colonised and terraformed by the earliest human settlers.
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M7
621.M7: Cassidy Ritasko, the second oldest of the Emperor's royal children, is born. It is important to note that since the Wedding of Immortals the Emperor has not been with any other woman besides the Empress. While the two immortals are capable of having children together, and none of the offspring are human, the Two's children are nowhere near as powerful as an Astarte, let alone a primarch. Cassidy, like her other non Primarch siblings, is both immortal, at least a ganma class psyker, and has a single power unique to them. In Lady Ritasko's case, the ability to travel without the use of the Warp between planets in seconds.
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Unknown date.M7: The original first contact made between Mankind and an intelligent xenos species. Many speculate that this species was the robotic Transformers in their early Golden Age or the loyal pre-Fallen Elinski or even the fierce hunter culture of the Yautja, nicknamed 'predators.'
Not long after, the Emperor loses track of His teacher, who has been living up to its namesake. It is later discovered that the Traveler went into hiding because the ruinous powers, not as terrible as they are today, have started moving against it.
Around the same time, the Immaterium is discovered.