Editing Alternate Heresy (section)

===The Dornian Heresy===
The '''[http://web.archive.org/web/20211213141252/https://bolterandchainsword.com/heresy/thedornianheresy.pdf Dornian Heresy]''' was the 40K web forum Bolter & Chainsword's project to switch the allegiances of the various Primarchs during the Heresy, and explore what would have happened to the Legions under their command if they had fallen or not.

Unlike the following scenarios, which were largely thought exercises in random threads on /tg/, this was a full project, with accompanying [[Index Astartes]] articles and quite a bit of fluff, which can still be found quite easily.

Essentially, during the incident on Davin, [[Magnus the Red]] actually arrives to visit and exorcise the infection on [[Horus]] instead of relying on [[Erebus]]' rituals. While successful at both saving the warmaster's life and preventing him from becoming corrupted, it did leave him out of commission. Following their temper tantrum, the Chaos Gods decided that the next best choice was [[Rogal Dorn]], who had been going on overdrive with his pet pain glove.

In the end, the [[Space Wolves]] fell to [[Khorne]] as part of their rabid psyker-hate. The [[Blood Angels]] fell to [[Nurgle]] in an event almost identical to the canon Death Guard, plus the bit where they practically owed their lives to Nurgle like Magnus canonically did to Tzeentch and now forced to recruit mutants to their cause. The [[White Scars]] fell to [[Slaanesh]] because Khan got drunk off his vanity and ego while sending his loyal sons to die on Chogoris. The [[Raven Guard]] fell to [[Tzeentch]], Corax himself being fed haunting visions of the future by Tzeentch. The [[Salamanders]] fell to [[Malal]] out of total disillusionment with the Imperium, and [[Rogal Dorn]] himself became the arch-traitor, with his [[Imperial Fists]] supporting [[Chaos Undivided]] (renaming themselves the [[Black Legion]] after the failure of the Heresy). The [[Ultramarines]] did not fall to [[Chaos]], but instead became [[Reasonable Marines]]; they seceded from the [[Imperium]] alongside much of the Ultima Segmentum, and now exemplify progress while fighting off the [[Tau]]. The [[Iron Hands]] seem to have gotten mixed up with the [[Necrons]], while the [[Fallen Angels]] won out over the loyalist [[Dark Angels]], with Luther triumphant.

On the Imperial side, the [[Word Bearers]] became the [[Ecclesiarchy]] (with no [[Kor Phaeron]] to twist it all to heresy - he proved incompatible with the gene-implants), the [[Iron Warriors]] remained siege masters, the [[Sons of Horus]] became the crusading [[Black Templars]] (after almost identically disowning Horus' foolishness which led to the Emperor being mortally wounded), the [[Emperor's Children]] remained exemplary perfectionists (except for [[Fabius Bile]], but he's dead now... except not), the [[Thousand Sons]] became blind psychic warriors (see: [[Grey Knights]]), the [[Death Guard]] became the core of the [[Inquisition]], the [[World Eaters]] became serious instead of angry, the [[Night Lords]] remained loyal [[Scary Marines]] without going over the edge, and the [[Alpha Legion]] were just as sneaky and just as anti-[[Ultramarine]], but still loyal (apparently [[The Cabal]] wasn't that convincing in the Dornian Heresy).

How the Space Marines are organized is also flipped, as the legions falling to Chaos occurred because of them being separated by all sorts of circumstances, so Abaddon (who takes over as leader of the Imperium after the Emperor's battle with Dorn) organized the legions into a few giant armies (by Space Marine standards).

It's pretty [[awesome]]...except that, as most alternate heresies are wont to, it all amounts to some absurd amounts of marine-wank. Perhaps the most particular is the Reign of Blood, where the [[Sisters of Battle]] never existed, because they were wiped out by the [[Word Bearers]] when they were still the Brides of the [[Emperor]], and [[Goge Vandire]] (who was now the new Chapter Master following Lorgar becoming a martyr post-heresy) wasn't overthrown by some simple preacher, but by a novice marine named [[Sebastian Thor]]. To be fair, can you really imagine the Word Bearers not recruiting him? Meanwhile, all of the xenos factions are left to mere footnotes or mentions (just as [[Games Workshop]] intended) and the impact this has had on the Imperium at large is left to interpretation.