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"To know one's place is the greatest comfort, to excel within it is the greatest solace, and a master's contentment is the greatest reward."

Codex Administratum Edition XXIIVC

The Adeptus Administratum, often referred to simply as the Administratum, and originally called the Imperial Administration at the time of the Horus Heresy, is the primary administrative and bureaucratic division of the Adeptus Terra, the heart of the gigantic bureaucracy that controls the government of the Imperium of Man, consisting of untold billions of clerks, scribes and administrative staff constantly working to manage the Imperium at every level, from assembling war fleets to levying taxes.

It is the largest of the departments comprising the Adeptus Terra, and billions of Administratum adepts work in the Imperial Palace complex on Terra alone. Its billions of officials on Holy Terra and throughout the galaxy are constantly carrying out population censuses, working out Imperial Tithes, recording and archiving information, and the million other things that are necessary for the running of the Imperium.

Such is its immense size, that whole departments of the Administratum have been submerged by a sea of complex bureaucracy, becoming lost in loops of paper trails. Other departments have continued to dogmatically operate and carry out their founding function, even if the intent and requirement behind them no longer even exists.




A scribe of the Imperial Administration maintaining meticulous records of an Imperial expeditionary fleet during the Great Crusade in the late 30th Millennium.

The Adeptus Administratum was originally created by the Emperor of Mankind as the Imperial Administration, the first bureaucracy for the newborn Imperium of Man, during the closing days of the Great Crusade, following the Ullanor Crusade of 000.M30.

The Imperial Administration was placed under the control of the Regent of Terra, Malcador the Sigillite, who was titled with the esteemed rank of Chief of the Imperial Administration, and is recognised in the 41st Millennium as the first Master of the Administratum.

As the single largest part of the Adeptus Terra, the bureaucrats of the Imperial Administration were to be responsible for the assessment of tithes, the distribution of resources, and essentially every administrative function the Imperium required to operate.

Today, uncountable and ever-changing quantities of offices, departments and divisions deal with almost every facet of maintaining a galaxy-spanning empire of a million Human-settled worlds, and every sector, world and citizen is subject to their scrutiny and intervention.

Within the Imperium, the agents of the Administratum are an innumerable and ever-present facet of interstellar commerce and politics, with the largest concentrations found on worlds with a particularly high military presence, high tithe requirements, or large-scale commerce. In particular, extensive Administratum offices on more developed worlds house hundreds of thousands of archivists, ordinates and prefects, who scrutinise sector-level operations with a keen eye and unwavering adherence to ancient doctrine.

Typically, the Administratum takes little direct action in regards to matters of law or violations of it within the Adeptus Terra, as such matters are the concern of the Adeptus Arbites. However, the attention to detail that characterises much of the work of the Administratum often discovers criminal acts where they would otherwise go unnoticed, detecting pirates from reports of missing ships and locating smugglers from incongruous audits and tithe manifests.

In situations such as these, the Administratum tends to hand matters over to another Imperial adepta so that appropriate action can be taken. Even once others are involved, the Administratum continues to observe, ensuring that everything happens by the book and as efficiently as possible.

By virtue of wider necessity, even at the sector scale, the Administratum enacts collective decisions that will affect millions, even billions of people every solar day. Such actions are arrived at by a simple and utterly impersonal process of procedure, precedent, tradition, and cold calculation based on long-established criteria -- heedless of the level of suffering or upheaval that they will cause at a local level.

Likewise, the absolute importance the Administratum places on the minutiae of its nightmarishly complex bureaucratic system and the strict adherence to regulations, forms, protocols, and due process, can itself be the source of great friction and dissatisfaction at all levels of Imperial society.

Worse still can occur when error creeps into the system, such as when the consequences of inaccuracy, lost data, or simple Human incompetence manifest themselves. Though exceedingly rare, it is quite possible for the Administratum to simply "lose a world" thanks to administrative error, condemning it to isolation and privation, or wrongly apply a Tithe Grade and thus render a world an asset-stripped wasteland. It might even misfile a request for emergency aid, which consequently arrives standard years, even centuries, too late. The trouble that such errors can inflict on a personal level are not hard to imagine; indeed, many individuals have had their records mangled, lost, or misregistered. For such unfortunates, unless very powerful, the consequences can be as shattering as they are impossible to rectify.

Of course, the lack of personal enmity involved in the Administratum's actions means little to those who may find their lives turned upside down, their families suddenly displaced or shunted wholesale to a strange world, their protections removed, their property seized, or themselves simply left to starve.

As a result, the Administratum is both hated and feared by all strata of Imperial society. Many, even in the other Imperial adepta, find them hidebound, petty, and obstructive. It is quite possible that through its work, the Administratum will breed bitterness and discontent that can explode into outright rebellion or provide an opening for darker forces to gain purchase.

The Administratum is also a shockingly parochial organisation, its adepts blindly ignorant of the nature of the world around them and naive of its many pitfalls and dangers. This naivete in itself can leave the Administratum's myriad local offices and workers vulnerable to individual canker, deception, and infiltration, and in any organisation where Human greed, ambition, vanity, and hubris may be found, worse still can bloom.

Ironically, the organisation's greatest defence against corruption is its own vast complexity and inertia. This makes it woefully difficult to derail or subvert in any widespread or meaningful way. If a thousand adepts have to be purged simply to ensure the accuracy of a particular tithe-repository's records, so be it. For the Administratum, nothing, not even the lives of its servants, is personal.

Factionalism and Internal Strife

Any complex system that relies heavily on the use of rigid dogma and protocol is subject to interpretation, and differences in such interpretation can lead to schism and discord. The Administratum is no exception to this.

Petty bickering, internal politics, and departmental rivalries can all cause problems within the Administratum, both on the larger and local scales, although the organisation is often at pains to never let such disputes show to outsiders.

While these minor disputes rarely amount to much in the grand scheme of things, their aftereffects can have wider ramifications, like the ripples spreading from a stone dropped into a still pool.


Ordinate-Major Mordechai Lorik

An ordinate-major of the Adeptus Administratum, a mid-level official in the Imperium's labyrinthian bureaucracy.

Of all the Imperium's governmental divisions within the Adeptus Terra, the Administratum is regarded as the least prestigious, but its high-ranking members are ironically among the most powerful people in the galaxy. If the Adeptus Terra is the machinery that drives the Imperium, the Administratum is the grease and oil that ensures this machinery operates. Without the Administratum, the machine would splutter to a halt and the Imperium would fail. As a result, the Master of the Administratum is in actuality the most politically powerful member of the High Lords of Terra.

Many Administratum positions are considered hereditary. Typical Administratum adepts labour within gargantuan vaults, sitting at logic-engines and cogitator workstations. They can be considered quite learned by Imperial standards. Like other non-combatant servants of the Adeptus Terra, the members of the Administratum wear a monastic style of dress, their habits varying in colour according to their rank within the adeptus and their area of responsibility. The basic colour worn by the lowliest scribe is black; higher-ranking members have increasingly lighter shades of grey, and eventually pure white.

While the Administratum is primarily responsible for all logistical operations related to the civil aspects of the Imperium, the division of the Administratum known as the Departmento Munitorum is responsible for the logistics of the Astra Militarum, organising military tithes, materiel supplies, troop movements and troop deployment. The Departmento is far more decentralised than the other divisions of the Administratum, establishing a presence on any world with a significant tithe-grade.

Distress calls from an invaded world are processed by the Departmento Munitorum, and will be passed up the ladder of bureaucratic command: star system to sub-sector command to sector command to Segmentum Command and eventually, in the most important cases, to the Senatorum Imperialis itself until one of them with enough resources, authority and responsibility can deploy the needed reinforcements.

Notable Divisions of the Administratum

The largest organisation of the Adeptus Terra, the Adeptus Administratum is itself divided into many branches. The great majority of its constituents have no concept of how their work fits into any overall scheme, or even that they are part of the same bureaucracy.

Comprised of innumerable divisions and offices it is unlikely that any one person, even the Master of the Administratum themselves, has an idea of how many divisions exist within the monstrous Administratum. Their work is an end in itself and the single most important factor in the lives of Administratum adepts.

It is enough to perform the task assigned; understanding is neither required, nor welcome. It is said by the soldiers of the Astra Militarum that for each soldier there are a dozen scribes and at least two minor officials toiling, recording petty details that no one will use or consider. Most of the divisions of the Administratum are petty and of little interest. Notable divisions of the Administratum include:

  • Departmento Munitorum - The Departmento Munitorum, also called the Adeptus Munitorum, is a department or sub-division of the Adeptus Administratum devoted to the general administration, personnel assignment, supply and logistics of the Astra Militarum. The Munitorum has ultimate responsibility for the raising of new Imperial Guard regiments, the training of new Imperial Guard troops, the provision of equipment and supplies to all regiments in the field, and the transportation of troops and equipment to and from theatres of war using the vessels of the Navis Imperialis. It is primarily a logistical organisation, like the larger Administratum of which it is a part, but while the wider Administratum deals with the civilian logistics of running the entire Imperium of Man, the Munitorum deals solely with the military logistics necessary to fight and win the Imperium's wars on behalf of all branches of the Imperial armed forces.
  • Departmento Exacta - The Departmento Exacta is the sub-division of the Adeptus Administratum tasked with the recovery of the Exacta, the second most important Imperial Tithe after that of the Departmento Munitorum, which determines what civilian strategic resources a world may possess that can benefit the wider economy of the Imperium. The Departmento Exacta has a well-deserved reputation for mercilessness and is able to command the invasion of a world should its criteria for the expected fulfillment of that planet's Exacta not be met to the exact specifications of their data.
  • The Estate Imperium - The Estate Imperium is a division of the Administratum described as "...the million-strong records office of the Administratum." Presumably its purpose is to keep the records of Imperial adepta and furnish them when they are called for by the relevant arms of the Adeptus Terra. The division's head carries the title of Chancellor of the Estate Imperium. The Estate Imperium's importance is such that its leader sometimes holds a position in the Senatorum Imperialis of the High Lords of Terra.
  • Historical Revision Unit - The Historical Revision Unit is another one of the myriad bureaucratic departments of the Administratum, whose adepts are the indentured servants and servitors known as "historitors" who work within the Imperial Palace. Their job is to revise subversive records of Imperial history into versions that are more reverent towards the Emperor and the version of Imperial history that most glorifies His name. The "Historicus" is the title of the unit's chief adept. One of the important duties of the Historical Revision Unit is seeking out historical records and, if need be, destroying them when ordered to do so by their superiors in the Administratum. Specially designated units of the Historical Revision Unit known as "Deletions Teams" carry out this function. Their most common duty is performing the vital task known as an Edict of Obliteration -- the deliberate destruction of any vital records or historical documents pertaining to an individual or organisation that has been declared Excommunicate Traitoris by the Emperor of Mankind, the High Lords of Terra or the Inquisition. The Historical Revision Unit's mission may now be threatened by the creation of the Logos Historica Verita by the resurrected primarch Roboute Guilliman in the Era Indomitus, who has once more taken up the roles of lord commander of the Imperium and Imperial Regent.
  • Officio Medicae - The Officio Medicae is the primary arm of the Administratum that deals with public health and biomedical-related issues in the Imperium, operating government-run medical facilities throughout the galaxy and on many Imperial worlds. In addition, they seem to oversee the management and quarantine of worlds or groups afflicted by plagues, such as those created and spread by Nurgle, the Chaos God of disease and despair. Like much of the Administratum, it is plagued by bureaucracy and irrelevant procedure.
  • Logis Strategos - The Logis Strategos is the primary intelligence-gathering and analysis agency of the Administratum. Its primary function is to analyze the myriad of threats to the Imperium presented by xenos and the forces of Chaos and devise suitable strategies to counteract them, which are then passed on to the Departmento Munitorum and the High Lords of Terra for action.
  • Logos Historica Verita - The Logos Historica Verita is a small Imperial organisation dedicated to recovering a full and accurate accounting of the history of Mankind unmarred by religious superstition or political bias. It was created in the Era Indomitus of the 41st Millennium by Roboute Guilliman, the lord commander of the Imperium, Imperial Regent and primarch of the Ultramarines Chapter, some time after his resurrection in ca. 999.M41. It was the primarch's intent to make a full and accurate accounting of the Imperium of Man's fragmentary and often contradictory history, the truth of which would inevitably help Humanity's advancement out of the darkness that had befallen it in the millennia after the Horus Heresy. For this task, Guilliman utilised individuals of an inquisitive and more liberal nature, and after training them personally in objective methods of data collection, assigned them the daunting task of discovering, collating and cataloging thousands of standard years of Human history that had been lost or was woefully inaccurate due to superstition, suppression or purposeful obfuscation by the High Lords of Terra.
  • Munitorum Strategic Intelligence Collective - The Munitorum Strategic Intelligence Collective is a secret arm of the Administratum that is composed of senior Ordo Xenos Inquisitors, Magos Biologis Genetors and other xenobiologists of the Adeptus Mechanicus. It is their primary mission to compile biological and logistical data on the Tyranids to determine their weaknesses and devise suitable counter-measures to future hive fleet invasions. These secretive reports are sent directly to the High Lords of Terra themselves. Their analysis of all the details of the Tyranid invasions suffered by the Imperium in the years before the Era Indomitus has seen them draw a startling conclusion as stark as it is terrifying: the hive fleets faced by the Imperium to date are but parts of a far greater whole, and this whole will be arriving at the Imperium's borders within less than a standard century. They estimate that Imperial mobilisation levels will need to be increased by a minimum of 500% -- which would effectively include every able-bodied man, woman and child on every world in Segmentums Solar, Obscurus and Tempestus -- to have even a hope of stopping this dire threat.
  • Tithes Chamber Notaries, sub. Planetary Census (Abhumans) - The Tithes Chamber Notaries, sub. Planetary Census (Abhuman) is a sub-division of the Adeptus Administratum that oversees the classification and recognition of stable and sanctioned Abhuman strains within the Imperium. Of these, forty-six types are now listed as extinct, and no records have been received of a further twelve strains for over a generation, suggesting that they too have died out or been assimilated back into the general population of Mankind. The status of the remaining fifteen Abhuman sub-species is quite varied and there is permanent disagreement about their specific classification amongst the adepts of the Tithes Chamber Notaries. The most noteworthy and contentious matter currently concerning the adepts is the Ogryn (Homo sapiens gigantus) matrix of Abhuman strains.
  • Divisio Auditae - Unique to the Administratum of the Calixis Sector is the Divisio Auditae, which oversees matters of significant interest to the Administratum from incorrect tithes to the adjudication of Warrants of Trade granted to Imperial merchants and Rogue Traders in the sector. The Divisio Auditae was established in the early 8th century of the 41st Millennium, created as one of the first acts of the Lord Calixis Marius Hax, and it reports directly to Hax himself and to its superiors in the Administratum.
    • Quaestors - Known more commonly (but unofficially) as quaestors, these auditors of the Divisio Auditae are empowered to travel the Calixis Sector and demand access to all records of any planetary government or organisation they come across; only the most powerful of individuals can deny a quaestor's demands, though even these few exceptions try Sector Lord Hax's patience. Anything they discover that seems worthy of attention is reported, to be acted upon by other agents of Lord Hax or other Imperial agents as deemed appropriate. Under the command of Prefect Salassar Aoghan Annovestes, a minor functionary from Sephris Secundus elevated through the ranks of the Administratum, the ranks of the Divisio Auditae have swollen to include over 6,000 separate quaestors. Each possesses the freedom to move and investigate whatever and wherever they see fit, much to the consternation of the Inquisition, planetary governors, and Rogue Traders who see such freedom of remit for an official who is essentially a bureaucrat as dangerous and intrusive into matters better left in other hands.

Notable Ranks and Titles of the Administratum

There are countless ranks and titles used within the Administratum; this system of nomenclature is also used within the Adeptus Terra as a whole. Some examples include:

  • Adeptus (or Adept) - An Adept is the title of all members of the Adeptus Terra, from the highest-ranking to the most petty of functionaries.
  • Prefectus (or Prefect) - Prefect is a title used by Administratum officers and senior officials.
  • Master - Master is a title used by Administratum departmental heads.
  • Ordinate - Ordinate is a title used by minor administrative officials.
  • Curator - Curator is a title used by Administratum adepts who maintain the ancient records of the Imperium; the rank also requires associated historical and linguistic knowledge and is therefore considered somewhat prestigious.
  • Scribe - Scribe is a title used by the lowly functionaries of the Administratum responsible for keeping records.
  • Historitor - A historitor is an adept of the Administratum tasked with writing, maintaining, altering and sometimes deleting the historical records of the Imperium. Before the Era Indomitus historitors were primarily employed by the Administratum in its Historical Revision Unit. After his resurrection, Primarch Roboute Guilliman trained a new corps of historitors in proper, evidence-based historical methods following the creation of his new organisation focused on historical truth, the Logos Historica Verita. The historitors of the Logos Historica Verita work at direct cross-purposes to the traditional duties of the Historical Revision Unit, as they seek to tell only the true history of Humanity in the Age of the Imperium, not to obscure, revise or destroy it for political purposes as was long the practice of the Administratum and the Inquisition.
  • Cipher - Cipher is a title used by a special form of Imperial messengers for information that cannot be trusted to astropaths; they memorise dictation with a single scan, repeating it verbatim when they reach their destination; they have no knowledge of the messages they carry.
  • Menial - Menial is a title used by lowly, non-specialised but free workers recruited from the non-adept population of the Imperium, they serve essentially as the Administratum's janitors and mechanics in maintaing the adepta's day-to-day functions at its facilities across the galaxy.
  • Subordinate - Subordinate is a title used by the hereditary slaves of the Adeptus Terra who serve as engineers and craftsmen, as well as in unskilled occupations as basic labourers, often aside servitors.

Adeptus Administratum and the Inquisition

The Administratum is by far the single largest organ of the Adeptus Terra. Untold billions of scribes, factors, bureaucrats and clerks manage the business of the Imperium at every level, upon every world.

The Administratum has an interest in every aspect of the running of the Imperium, from the collection of planetary tithes to the proper distribution of resources. Therefore, it is only to be expected that an Inquisitor crosses paths with any one of these functionaries in the course of their duties.

The main resource the Administratum controls, and which the Inquisition often requires access to, is information. It is said that nothing occurs in the Imperium that is not at some point recorded by an Administratum scribe, catalogued, filed, copied in quadruplet, processed in one of the Adeptus' vast datamills and, perhaps many standard centuries later, archived.

Each phase in this process might take solar months, even standard years to accomplish, dependent upon the perceived relevance of the information. Unfortunately, the individuals that determine the relevance do so entirely according to their own set of values, often more concerned with the niceties of data-retrieval systems than with any external consideration. Thus, an incorrectly phrased request for military aid might be returned to its sender to be completed again, while that sender's entire world falls to alien invasion in the meantime.

Despite the staggering inefficiencies of the Administratum, the Inquisition does have great use of its resources. The key to a successful investigation involving the Administratum is to bypass or cut through as much of the red tape as possible. This is supposedly what the Inquisitorial Rosette is intended to facilitate, although many officious scribes treat it more as an annoyance than the Sword of Damocles it truly represents should they stand in the way of the bearer's duties.

Once they have access to the vast reservoirs of data the Administratum maintains, an Inquisitor can filter through millennia of information in the search for patterns indicating the actions of their enemies. Few Inquisitors have the ability or indeed the inclination to undertake such searches themselves however, and most utilise the skills of sages among their retinues of Acolytes to mine the data for the information they require.

As with most other Imperial organisations, the Inquisition has had cause to investigate various bodies within the Administratum. At times, entire divisions have been accused of inefficiency on such a vast scale that a particularly Puritan Inquisitor has decided to execute many thousands of bureaucrats for their crimes against Humanity.

At other times, the activities of a given bureau or department have become corrupted, concealing treachery and criminality. Corruption for personal gain, such as the diverting of resources to a local black market is perhaps the least of concerns, for the extent of the Administratum's control can lead to entire worlds being lost to the Imperium, falling instead into the hands of the Emperor's enemies without a single shot being fired.



  • Codex Imperialis, pp. 12-14
  • Codex: Eye of Terror (3rd Edition), pg. 13
  • Codex: Tyranids (3rd Edition), pg. 41
  • Dark Heresy: Ascension (RPG), pp. 179-180
  • Dark Heresy: Core Rulebook (RPG), pg. 44
  • Dark Imperium (Novel) by Guy Haley, Ch. 9 "Imperator Gloriana," pp. 94-97
  • Dark Heresy: Disciples of the Dark Gods (RPG), pp. 165-166
  • Imperial Armour Volume Eight - Raid on Kastorel-Novem, pg.7
  • Imperial Munitorum Manual, pp. 3, 8
  • Rogue Trader: Hostile Acquisition, pp. 88-90
  • Warhammer 40,000: Rogue Trader, pg. 140
  • Warhammer 40,000: Rulebook (Digital Edition) (7th Edition), pp. 271, 275, 281, 283, 286, 298, 301, 304, 321, 339, 374, 386, 464, 540-541, 544, 546, 550
  • Warhammer 40,000: Rulebook (6th Edition), pp. 139, 404-405
  • Deliverance Lost (Novel) by Gav Thorpe
  • Shadowsword (Novel) by Guy Haley, pp. 11-21
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