Editing Aprior Sector Timeline (section)

== M41 ==

;Early M41: The Shadow in the Warp, advancing ahead of the approaching [[Tyranid]] Hive Fleets, dampens the Veil Storms, restoring contact between the [[Imperium of Man]] and the [[Aprior Sector]] over the period of a couple of decades.  Contact is still limited, due to the distance between the Aprior Sector and the major star-routes, but the Aprior Sector [[Imperial Guard]] and [[Knights Inductor]] send their tithed Regiments and a couple of Companies, respectively, into the Imperium proper, where they attract the [[Inquisition]]'s attention.

;ca. 200.M41: Roland Darren is recruited by the [[Knights Inductor]].

;404.M41: Over the course of several decades, the government of the world of Archos makes a deal with the [[Dark Eldar]] pirates endemic to the region, the Kabal of the Hand of Fate.  The Hand of Fate demands living, young, and healthy tributes, which Archos supplies from their PDF.  The Hand of Fate pumps their tributes for information, and eventually learns the secrets of Archos' defenses.  Within the space of a few hours, all contact is lost with Archos, and when the Apriori Guard Regiments and Knights Inductor investigate, they realize that the Dark Eldar have taken Archos and begun to kidnap every human being on the planet.  The Hand of Fate is repelled and Archos is recaptured, but millions of soldiers and civilians perish in the process, and millions more are taken back to Commorragh.  Realizing that their central authority lacked the power to prevent such atrocities, the Apriori create Aprior Sector Internal Security, an organization similar in focus to the Inquisition, with the task of coordinating investigations of threats to the Sector.  The Knights Inductor, Apriori Imperial Guard and PDF, and Battlefleet Aprior form the Aprior Sector Executive Council, an advisory body with the task of coordinating military responses to those threats.  The Aprior Sector Charter is revised to slightly reduce the autonomy of individual worlds by requiring all dealings with outsiders to be conducted by Sector-level authorities.

;472.M41: The Kobol Branch of ASIS, under Director Janus Doscaras, massively exceeds its authority, influencing the Kobol government through blackmail, establishing shell corporations to manipulate the public, and eventually instituting martial law in response to a "clear and present danger" of Chaos-backed rebellion.  Kobol becomes fractious as people are driven to be deeply suspicious of each other, and in the ensuing mayhem and societal discord, Chaos-aligned forces are able to infiltrate Kobol and instigate a rebellion.  Thanks to the ASEC and Sector loyalists on Kobol, the Sector-level response arrives in a more timely manner than it did to Archos, but hundreds of thousands still die due to violence and disruption before order is restored; the process of purging the forces of [[Chaos]] from Kobol takes many years more.  The Apriori implement transparency measures to prevent one organization from gathering so much power, as well as expanding public education programs to include [[Apriori Public Service Announcements | brief lessons on threats to the Imperium]] and civil defense training, so that Apriori citizens are better able to identify and deal with them without becoming paranoid.

;506.M41: ASIS's experiments with treating heretics pay off, leading to the first apparently "cured" heretics.  Upon departure from the Panopticon's warded zone, some of them are immediately possessed by daemons – their souls had, apparently, been marked somehow during their servitude to the Ruinous Powers.  Five Silencers are required to halt the incursion; several dozen security personnel were killed or injured containing the involuntary daemonhosts until they arrived.  From then on, captured heretics are confined indefinitely to warded zones.

;572.M41: "[[An Investigation into the Heresy of the Reasonable Marines]]," in which Inquisitor Rightina Immam is dispatched by the Conclave Astartum (of [[Inquisition | Ordo Hereticus]]) to investigate the Aprior Sector and report on what, if anything, has changed.  She leaves with the distinct impression that the Apriori are hiding a lot.  Pending the results of the Inquisition's verdict, and aware of the shaky ground on which they stand, the Apriori decide to keep to themselves, beyond their legal commitments.

;742.M41: The Imperium launches the Damocles Crusade against the [[Tau]] Empire; three Companies of Knights Inductor and forty Regiments of the Aprior Sector [[Imperial Guard]] join the Imperial forces.  Several hundred Tau prisoners of war and defectors are taken back to the Aprior Sector, where they are surgically freed from Ethereal control and rehabilitated (for example, training the Fire Warriors to keep their violent instincts under control).  In the Crusade's aftermath, the Tau commence their Second Phase Expansion, including the world of N'dras – which is abandoned shortly thereafter, for unclear reasons.

;785-788.M41: Inquisitor Immam arrives at Nemesis Tessera to give her report to the Inquisitorial Panel Regarding the [[Knights Inductor]] and [[Aprior Sector]].  The verdict, due to bureaucratic inertia, and the fact that the Aprior Sector doesn't seem to be too much of a threat (compared to the many other known threats in the galaxy), is that the Sector and its Chapter are loyal, if unorthodox, and that Rightina should return to the Sector to keep further watch for irregularities.  Monodominant Inquisitor Lord Avius Damnos is not convinced; he begins contacting allies to send a Crusade against the Aprior Sector, code-naming his Crusade Fleet "Task Force Dagger."  His need to operate secretly means that it will not mobilize for many decades or centuries.

;801.M41: Tech Maestro Gajet's greatest technological achievement is completed after 200 years of development.  The MkI Damocles Power Armor is quickly spread throughout the Knights Inductor forces, with old power armor systems repurposed with the new technology.  Artificer armor and Tactical Dreadnought Armor are not modified due to their special nature.  

;Late M41: The [[Ecclesiarchy]] sends several pilgrimages and expeditions to the Aprior Sector, hoping to return it to mainstream Imperial policy.  At first, their ostentatious, rigidly hierarchical style repulses the practical-minded Apriori, but later expeditions from the "Confederation of Light" sect, whose beliefs emphasize humility and service rather than inherited titles and impressive ornamentation, are more successful.  They are especially successful in the border systems, which makes it easier for the Ecclesiarchy to move in, and the Imperial Cult's rhetoric of mankind constantly at war with aliens, mutants, and heretics resonates with the people living there, as they tend to bear the brunt of alien invasions.

;898.M41: [[Reasonable Daemonette | Ardi]] is summoned by a [[Slaanesh | Slaaneshi]] cult on Aprior Secundus; upon learning that the cult practices human sacrifice, she blows the whistle on them to Aprior Sector Internal Security.  Some ASIS agents become convinced that Ardi is evidence that the gods of Chaos have their positive sides, and that by worshiping those positive aspects, the galaxy will be put on a path to improvement.  Those who go public with their plan are rejected and are arrested, being put through a rehabilitation program; others continue their worship in secret, calling themselves the "Adepts of Unified Order," leaving the Sector to spread their beliefs throughout the galaxy.  A few tech-priests, two squads of Knights Inductor (re-naming themselves Knights Reductor), and a Regiment of Apriori Imperial Guard fall with them.

;899.M41: [[Tyranid|Hive Fleet Gorgon]] invades the galaxy.  The Apriori screening programs keep them mostly free of [[Genestealer]] cults, and so most of the Hive Fleet passes them by.

;901-912.M41: After Lufgt Huron takes control of the Maelstrom Zone, he decides that he is not getting enough Imperial support and secedes, starting the [[Badab War]].  Many see parallels between this event and the [[Aprior Sector]], and Lord Damnos's Crusade gains much more support.

;902.M41: A [[Genestealer]] Cult on Tarquin Ventrus manages to avoid detection and attract a splinter of Gorgon, designated "Draco."  The fleet consumes the Blank gene, severing them from the Hive Mind.  The warrior organisms starve without its overriding drive, and the Norn Queen becomes self-aware; the Librarius of the Knights Inductor establishes tentative psychic contact, designating the Norn Queen "Adelind."

;915.M41: "The Mines of Death" (coming soon), in which mining efforts on a to-be-named Dead World uncover the remnants of the Tranzekh Dynasty and trigger the reactivation sequence.  The expedition finds itself caught in the crossfire of an eons-old rivalry, with the fate of the Sector in the balance.

;920.M41: "The Defense of Lida" (coming soon), in which Battlefleet Aprior detects the Emperor's Children Strike Cruiser “Circus of Envy” on an intercept course with the [[Eldar]] Exodite World of Lida.  A stealthy RKV attack delays the vessel and leaves it without orbital attack capability, forcing the Strike Cruiser to make a ground assault.  A rapid-response force consisting of Apriori PDF and a Knights Inductor leadership and diplomacy team is dispatched to render assistance to the Eldar defenders, while a strike team of Silencers neutralizes the ritual sites on the ground and on the Circus of Envy.  The Eldar learn that they cannot scry the Silencers, which convinces them to consider closer cooperation with the Apriori in the future – a decision reinforced when their prognostications reveal that neither the Apriori nor the Lidans will survive the coming millennia on their own.  They also give a cryptic warning to the Apriori: among other things, they will be beset by "daggers and hounds."

;951.M41: Da Green Shadow arrives in the Aprior Sector; they quickly take up residence in the eastern border, eager to fight the encroaching Tyranid forces.

;964.M41: The border system of Norion, wracked by damage from recent [[xenos]] incursions, suffers an economic depression.  Puritan Preachers claim the disaster to be a sign of the Emperor's displeasure, and undercurrents of discontent come to the surface and buoy them to power.  Matters come to a head when Joachim Urian, Pontifex Mundus of Norion V, limits his sanction to those Cults Imperial which support him (the Puritan sects), using the others as scapegoats for the social woes of the Imperium.  Urian and his appointed Preachers advocate intolerance against 'anyone who threatens the dominance of mankind,' which included most advocates of Apriori social reforms and outsiders of any sort.  Violence ensues, especially as Radical Preachers arrive from other planets and attempt to counter Urian's influence, which attracts the attention of the whole Sector, leading to hearings before the Aprior Sector Legislative Assembly; in the end, the Aprior Sector Charter is modified to have stronger protections for the individual, and Urian is relieved of his duties.

;977.M41: In response to a string of daring raids by the [[Dark Eldar]] Kabal of the Hand of Fate, Battlefleet Aprior plants a false distress signal on a Q-ship, and disables the unsuspecting Dark Eldar fleet with an ambush.  A [[Knights Inductor]] termination force (led by a Silencer strike team) infiltrates the stranded ships, annihilating the Dark Eldar aboard and rescuing several thousand prisoners.

;987.M41: A [[Genestealer]] Cult on Tarquin Dorsus is identified (thanks to a warning from Adelind) and destroyed, resulting in several infectees being captured.

;994.M41: The Hunter Cadre "Doom Seekers" discovers ancient structures on the abandoned world of N'dras; this discovery prompts the Ethereal in charge to order the Cadre to kill itself, but, unexpectedly, they resist.  Instead, the Cadre is marked for mind-wiping and re-conditioning.

;997.M41: The Tau Empire launches its Third Phase Expansion, and sends (among other things) a full Contingent to probe the Aprior Sector.  ''More to be said on this topic.''

;999.M41: The Zeist Campaign; the [[Knights Inductor]] supply two Companies (equivalent to five or six Companies of most Chapters), and the [[Aprior Sector]] [[Imperial Guard]] sends twenty Regiments to hold territory behind the [[Space Marine]] spearhead.  The campaign includes an attack on a Tau re-education camp, where the remnants of the Doom Seekers (among others) are imprisoned.  The Apriori 223rd take as many prisoners as possible back to the Aprior Sector, where they are surgically liberated and rehabilitated.  Fio'El Vral (or Underminer, as he came to be known) chooses to join the Aprior Sector Mechanicus.

;000.M41: "Tales from the Aprior Sector: For The Greater Good" (coming soon), in which a former Fire Warrior learns that not all Apriori are in favor of tolerating xenos.