Imperium of Man

Biodata

Feature	Information
Name	Imperium of Man
Original Name	人类帝国
Alias(es)	Main Universe Empire; Empire
Type	Trans-universal, human-led imperial state
Founder / Ruler	Sui Yang, the God-Emperor of Mankind
Predecessor	Atlas, later reorganized as an imperial megacorporation integrated into the Imperium 350
Affiliation	Atlas; Primarchs and their Legions; Imperial Administration; Heretic Inquisition; Investigation Department
Status	Active
First Appearance	Chapter 218 (foreseen founding) 218
Formal Founding	April 14; publicly marked by an Imperial ceremony attended by thirteen Primarchs and their Astartes Legions 349 350

Background / History

Atlas laid the Imperium’s foundation through the forcible unification and reconstruction of human worlds. Under Guilliman’s governorship, Atlas consolidated Universe 01 after the Mimic war, taking control of major states and completing Earth-01’s unification by the end of Main Universe year 2000. The campaign released over two million armed personnel for further expansion. 189

After Terraria was unified, Dorn and several Primarchs expected Sui Yang to transform Atlas into a true empire. Their experiences with corrupt elites, state violence, and unaccountable privilege convinced them that a centralized system directly answerable to the Emperor was necessary. The Regulatory Department remained under Sui Yang’s direct command, with even Primarchs barred from interfering. 271

The Imperium was formally founded in a public ceremony at the Imperial Palace. Sui Yang declared humanity’s intention to command the multiverse and rescue human brethren from alien threats, while the Primarchs and their Legions pledged unity before the population. 349

Following the founding, Atlas became an imperial megacorporation whose political, military, economic, and civil functions were inseparable from the new state. The Imperium’s political and military systems largely continued Atlas’s structure, while institutions such as the Heretic Inquisition were created to enforce ideological and security control. 350

Government and Society

Imperial Authority

The Imperium is an autocratic state centered on the Emperor’s will. Sui Yang commands through direct authority, psychic influence, intelligent AIs such as Apu and Melissa, Primarch governors, and specialized administrative departments. The Primarchs retain major military and regional responsibilities, but the Empire’s economic and political systems remain under central control. 304 874

Its governing model rejects hereditary aristocracy as a permanent ruling class. Administrative posts are presented as accountable professions obtained through examinations, training, and assessment rather than inherited privilege. 1028

Law and Order

The Imperium’s social order is defined by the principle that “might makes truth,” despite its highly developed infrastructure, ecological zones, and public services. 634

• The Regulatory Department investigates corruption and abuse, including among Imperial leadership. 271
• Resistance movements, criminal leaders, corrupt officials, and collaborators are suppressed, arrested, or tried under Imperial law. 979
• On conquered worlds, the Empire commonly seizes military, political, and economic control before rebuilding civil administration. 777
• The Empire combines harsh deterrence with reconstruction measures such as housing, medical treatment, education, employment programs, and food distribution. 703 777 887

Religion and Ideology

After its founding, the Imperium used military force to eradicate organized religions within three months, regarding them as tools of manipulation and control. 350

This policy coexists with widespread reverence for the Emperor, Primarchs, and Imperial champions. Sui Yang’s immortality, psychic power, and visible interventions foster devotion among civilians and allied species, while collective belief can strengthen Imperial figures and defenses. 350 598

The Imperium promotes humanity, unity, order, responsibility, and collective advancement as its central ideals. It portrays itself as humanity’s defender against internal exploitation, Chaos, hostile xenos, and supernatural threats. 892 893

Territory and Population

The Imperium expanded from the Main Universe into a multiversal state connected through spatial gates and warp technology.

Milestone	Documented State	Chapter
Terraria unified	Atlas completes Terraria’s unification, prompting plans for a true Imperium.	271
Early Imperial era	The Imperium’s population, including Elites, elves, and other demi-human races, reaches roughly 400 billion.	359
Expansion into 17 universes	The Imperium controls seventeen parallel universes beyond the Main Universe.	635
Star Wars integration	Following the absorption of major Galactic Empire territory and Old Republic forces, total population reaches roughly four quadrillion.	634
StarCraft integration	Hundreds of billions of humans and ten billion Protoss join the Imperium.	750
Further expansion	The Emperor orders the opening of gates to Universes 24 and 25 and begins the Genesis Plan for a new universe.	875 876

Core Worlds

• Earth / Main Universe — The unquestioned political center of the Imperium and site of the Imperial Palace. 749
• New Accra — A core administrative hub on Earth, distinguished by Sky Pillars, ecological zones, integrated technology, and a large alien population led by Sangheili residents. 634
• Universe 01 — A major Ultramarines-governed colonial region with over five hundred terraformed Earth-like worlds, 99.8% adult literacy, and the highest citizen-satisfaction index among Imperial territories. 635
• Terraria / Universe 07 — A fortified “Magic World” whose elven and dwarven resources support the Imperial Fists and broader Imperial industry. 559 635
• Universe 17 — The Star Wars universe, whose conquest transformed the Imperium’s demographic and territorial scale. 634 636

Military Forces

The Imperium’s military is built around Primarch-led Astartes Legions, supported by auxiliary armies, clone soldiers, biological weapons, fleets, engineering corps, intelligent AIs, and specialized departments.

Force	Role
Astartes Legions	Primary expeditionary and conquest forces, commanded by Primarchs and responsible for major interstellar and inter-universal wars. 350
Imperial Guard and Planetary Defense Force	Supporting and defensive military formations subordinate to the Legions in major campaigns. 350
Auxiliary Forces	Large forces enhanced with Inquis Serum, advanced equipment, and power armor; often used alongside Astartes in occupation and frontline operations. 446 989
Custodes	The Emperor’s personal guards, equipped with black-and-gold power armor and Thunder Power Halberds. 802
Grey Knights	Psychic anti-Chaos force attached to the Heretic Inquisition and answering only to the God-Emperor. 383
Heretic Inquisition	Investigates, suppresses, and purges heresy, Chaos contamination, and ideological threats. 350 355
Investigation Department	Conducts reconnaissance, infiltration, intelligence analysis, and contact operations in new universes. 929
Imperial Engineering Department	Establishes modular frontline bases, rebuilds conquered worlds, and constructs megastructures and superweapons. 777 987

The thirteen founding Legions fielded approximately 700,000 adult and underage Astartes, supported by around ten million total Legion personnel and auxiliaries. 350 The number later surpassed twenty million after Universe 17’s integration and exceeded twenty-two million before the expedition into the Warhammer 40,000 universe. 637 983

Strategic Doctrine

• Unification — Human worlds are expected to submit to Imperial authority and enter a centralized order; independent forces are treated as assets to absorb, vassals to manage, or opponents to eliminate. 557
• War sustains war — Captured vessels, technologies, industrial capacity, and personnel are incorporated into Imperial forces whenever practical. 572
• Overwhelming deterrence — The Empire regularly displays fleet strength, orbital firepower, and Astartes deployments to break resistance before extended conflict begins. 637 902
• Reconstruction after conquest — The Imperium follows military takeover with infrastructure repair, public welfare measures, education, and administrative restructuring. 703 777
• Preemptive security — Civilizations considered future threats to humanity may be assessed, “persuaded,” or eliminated before they can develop into major enemies. 840

Technology and Strategic Assets

• Spatial gates and warp gates — Enable trans-universal travel, rapid force projection, and the establishment of forward bases. 350 900
• Forerunner-derived technology — Forms the basis of major Imperial advances in warships, portals, teleportation, defensive systems, and strategic infrastructure. 778 976
• Sojourner-class Dreadnoughts — Fully mastered Forerunner-derived capital ships capable of dominating most known parallel universes. 446
• Emperor-class Battleships — Massive capital ships, including vessels up to thirty kilometers long such as the Pride of the Imperium. 902
• Great Devices 01–04 — Four artificial ring structures, each eight thousand kilometers in diameter, serving as mobile fortresses, laboratories, and strategic weapons. 778
• Great Device pulse wave — Great Device 01 erased all life matching the Marker/Blood Moon signature within a 30,000-light-year radius. 783
• Golden Throne — Amplifies the Emperor’s psychic power, supports his perception across Imperial territory, and helps shield the Empire from Warp influence. 459 1027
• Flowers of Purity / Human Will — A planned and deployed system intended to monitor threats to humanity through a formal-logic intelligence modeled after Eywa. 321
• Tyrants and other biological weapons — Imperial biotechnology creates combat organisms for high-intensity warfare, though they remain subject to battlefield losses. 498 908

Species Policy

The Imperium places humanity at the center of its ideology and regards hostile xenos, Chaos-corrupted entities, and human traitors as existential threats. Its treatment of non-human peoples depends on compatibility, loyalty, and perceived strategic value. 556 871

• Subhumans — Intelligent races reproductively compatible with humanity may receive full Imperial citizenship under the Subhuman Rights Act. 636
• Secondary citizens — Cooperative non-human peoples that aided humanity or resisted oppressive powers may receive restricted civil rights after strict review and continued supervision. 871
• Sangheili / Elites — Integrated into society and the military after psychic conditioning; they are considered among the Empire’s most loyal allies. 395
• Elves and dwarves — Terraria’s elven and dwarven populations contribute resources, craftsmanship, psionics, engineering, and political alliances to the Imperium. 559
• Protoss — Accepted as allies and refugees in Universe 18 after joint action against Chaos; Imperial forces and elven psionics assist in cleansing corrupted Protoss children. 710 712
• Hostile species — Races deemed violent, incompatible, corruptive, or irreconcilably hostile may be rejected, controlled, displaced, purged, or exterminated. 369 395

Major Campaigns

Arc / Campaign	Outcome
Terraria Unification	Atlas unifies Terraria and reestablishes human-led imperial rule, creating a major foundation for the Imperium’s founding. 271
Trench Crusade Unification	Athena, Astartes, and Imperial forces destroy Hell’s leadership, defeat heretical forces, and establish Imperial authority over frontier regions. 385 394
Star Wars Unification War	The Rebel Alliance is reduced to a dependent Imperial partner; the Galactic Empire’s territories are conquered, reorganized, and incorporated. 557 634
Koprulu Sector Campaign	The Imperium defeats the Terran Dominion, occupies Korhal, confronts Chaos corruption, and forms alliances with cooperating Protoss forces. 701 706 712
Dead Space Campaign	The Imperial Warriors Legion seizes Earth and its colonies, destroys Marker/Blood Moon threats, and rebuilds the Solar System under Imperial rule. 776 777 783
Universe 22 Campaign	Imperial forces confront the Qu and Combine Empire after discovering large-scale atrocities against humanity. 826 833 841
Universe 24 / Viltrum War	The Imperium purges Chaos-corrupted Mars, defeats corrupted Viltrumite forces, accepts surrendered vassal races, and rebuilds the region. 902 962 979
Great Crusade into the Warhammer 40,000 universe	Horus leads multiple Legions from Viridian to secure human worlds, purge Orks, Tyranids, Necrons, heretics, and establish a foothold in Ultramar. 1000 1004 1044

Key Associations

• Sui Yang / God-Emperor of Mankind — Founder, supreme ruler, psychic protector, and final authority of the Imperium. 350 900
• Atlas — Predecessor corporation and continuing imperial megacorporate institution integrated into the Empire’s state structure. 350
• Primarchs — The Emperor’s Offspring, Legion commanders, governors, and principal administrators of Imperial expansion. 349 635
• Astartes Legions — The Imperium’s decisive military arm in inter-universal conquest, defense, and pacification. 350
• Chaos — The Imperium’s principal metaphysical enemy; its corruption, daemons, cults, and Warp incursions are subject to continual suppression and purification. 394 900
• Imperium of Man of the Warhammer 40,000 universe — A parallel counterpart regarded as decayed, stagnant, and corrupted in contrast to the Main Universe Empire’s active Emperor, technological progress, and functioning administration. 1023 1027