Timeline

**Major Timeline of Humanity and the Terran Imperium**

The Imperium uses a special Dating System derived from the original Gregorian Calendar of Old Earth that denotes the current year by the notation (year of the millennium).M(number of the millennium). For example, the year 20,999 A.D. would be represented as 999.M21, while 21,002 would be 002.M22 and the year 2021 would be 021.M3. However, the year 21,000 A.D. would be 000.M21, since the new millennium starts at the year 001 and has no Year 0.

Within the 23rd century humanity had extensively colonized the solar system and many nations or other factions had formed, creating a cluster of power struggles, intrigue and other problems which majorly halted the advancement of humanity.

Nothing seemed to be able to put an end to the stalemate, until one day a messiah was born on Terra in a powerful noble house. Not much is known from these ancient times eons ago, but this individual seemed to gain the title of "The One'' after his early life of learning and studying about the current situation and past of humanity, when he had accumulated a group of loyalists and followers who believed in his words.

This escalated into him becoming the leader first of his house, then on Terra where he proclaimed himself Emperor among his loyalist followers and ultimately launched the Great Crusade to reunite the worlds of the Sol System under the Terran Imperium’s control.

Legends tell that once the Terran Solar System was secure, and the process of rebuilding firmly in hand, a focus was set on and resources were freed for science and technological advancements again, which brought in a golden age of technological advancements, including the eventual discover of Faster-Than-Light travel which enabled efficient exploration and expansion to other Star Systems.

Now galactic conquest began in earnest and has never stopped to this day as the Imperium conquers & colonizes worlds and systems one after another.

**The Calamity**

The Calamity is a 1000 year war fought between the Galactic Terran Imperium and the Eternal Hive. The Imperium and the Swarm had various engagements throughout the Terran’s roughly ten millennia long duration of rapid interstellar expansion, ranging from smaller engagements to larger singular battles in a solar system.

This all culminated in roughly the start of the 20th millenia of the common era (subject to change; Imperial Time measurement system) when both forces began to meet each other in major battles, beginning the Calamity, as it is called by the Imperium. Imperial major worlds were invaded by the Eternal Hive, and infected worlds were attacked by the Imperium, although the former had much more success as with every invaded world billions of humans and often habitable atmospheres offered plenty of biomass for the Hive to replace any losses and even expand as it lead its conquest throughout Imperial Space, while the Imperium had nothing to gain from a infected world but to slow its enemy down.

This went on for 500 years throughout which major battles were a daily occurence, be it a siege on a planet or a space engagement. In this time the Imperium was on the relatively slow, but steady and ever-pressing retreat as it could not find a way to halt the expansion of the Hive reliably. Entire Ecumenopoleis fell during this time and trillions of humans died or were used alive by the Swarm.

Beginning roughly in what today is considered the middle of the Calamity War, the Emperor personally was successful in genetic enhancements to the point that mass production of reliable and healthy supersoldiers, called the Legionaries, the production of which was rapidly increased. These new soldiers were but one part in the war effort of the Imperium to halt and ultimately strike back onto the Swarm.

Through this adaptation to its gravest enemy so far the Imperium ultimately pushed back the Swarm far enough and weakened it enough that the Hive itself deemed the Imperium no longer worthwhile, at least for the time being, and disengaged the Imperial Territory to regroup and regrow in another part of the galaxy, which it has done until today.

957.M2 - First artificial Terra satellite

961.M2 - First human to orbit Terra

965.M2 - First space walk

969.M2 - Humans land on Luna making it the first world ever explored by Mankind

020.M3 - Start of Age of Interplanetary Expansion & Colonization by Mankind in the Sol System

024.M3 - First unmanned mission to Mars as preparation for colonization

300.M3 - Humanity is spread throughout the overpopulated and industrialized Sol System, technology and expansion begins to stagnate as cold wars, skirmishes and interplanetary wars rage throughout the system -> Beginning of the Unification wars through the (not yet crowned) Emperor and his followers on Terra, first conquering all of Old earth and then the rest of the Sol System

375.M3 - End of the Unification Wars, Founding of the Imperium including the Imperial Charter which declares the Chivalric Code and Feudal System, First Golden Age of Technological Advancements begins

600.M3 - Invention of FTL, expansion of humanity into other star systems

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**M3 - M20** - 17.400 years of Stellar Expansion for Humanity

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000.M20 - Begin of Xenos Invasion and the Great Strife, Imperium on the loosing end for ~500 years, loss of massive amounts of territory, Economy diverted to the war effort instead of interstellar colonization

500.M20 - First successful combat use of Legionaries after Invention and Development by the Emperor Himself -> Massive Expansion of Legionary production facilities, Imperium begins to win battles with specific, intentional tactics and strategies with quality troops instead of only slowing the enemy with masses of unaltered Infantry

000.M21 - End of the Great Strife, enemy is wiped out almost completely, last remains are hunted down; Humanity begins recovery & rebuilding period, recolonizes and -conquers lost territory

000.M22 - Second Golden Age of Technological Advancements begins as humanity can focus on territory, population and economic growth as well as technological advancements again, massive modernisation campaigns take place throughout the entire Imperium