Editing Fallen Angels (section)

==Grey Knights==
More than any other Chapter, the Dark Angels and the Unforgiven fear what would happen if the [[Grey Knights]] should become involved with a hunt for the Fallen Angels. Making Inquisitors or even fellow Space Marines "disappear" or "dying due to battle circumstances we couldn't have prevented" is one thing. Trying to do the same to Space Marines from a Chapter designed to fight and kill [[Daemon]]s? Near suicidal, even by 40k standards. For anyone other than the Dark Angels.  In their case it is probably more fear of crossing the line into outright treason along with knowing the damage their legion’s power could cause to the Imperium if unleashed.

However, as revealed in the novel ''Pandorax'', it's irrelevant. When the [[Black Legion]] attempted to open an ancient warp portal the Grey Knights were sent to the planet Pythos in order to seal the breach and deal with the demonic incursion, Supreme Grand Master Draigo was unable to wait for reinforcements from among his own forces due to his Chapter being scattered around the Imperium in response to a myriad of daemonic threats, instead he opted to enact an old oath sworn to the Grey Knights by the Dark Angels.

[[Azrael]] had initially refused to honour the pact, considering it to be tantamount to blackmail. His mind was soon changed when Draigo revealed an interesting nugget of information gleaned from interrogating a Traitor Astartes prisoner who revealed that he knew about Traitor Space Marines the Dark Angels had captured and now kept up on [[the Rock]]. Draigo was well aware that the Dark Angels would go to great lengths to protect their secrets and although he was unaware of the reasons why they would have such a vested interest in those imprisoned beneath the Rock he could still make an informed guess as to the nature of those secrets. And probably rather liked the idea of the Dark Angels hunting down and punishing traitors.

It was not the possible knowledge of the Fallen that had motivated Azrael and his chapter, but rather the Grey Knight's knowledge of the methods employed by the Dark Angels to keep their secrets hidden, that ultimately ensured they honoured the ancient pact struck with the Grey Knights. And so the leader of the Dark Angels committed his entire Chapter to the Pandorax campaign, operational superiority the Grey Knight’s sole concession in exchange for cooperation. Though they were nominally allies, the relationship between the two Chapters had always been fractious, never spilling over into confrontation but coming near on more than one occasion. Being forced to operate so closely together would put that to the test once again, more so in light of the circumstances of their alliance.

Several times in the book, Draigo warns Azrael that the Dark Angels will not interfere in his operations, or he will go straight to the [[High Lords of Terra]] and tell the High Lords about what the Dark Angels are doing. Azrael considers the threat so real that he commits the ''entire'' Dark Angels chapter (over nine hundred Astartes and nearly one hundred Neophyte Scouts) to the threat. However, that being said, let's be real here: for all the weight the word of the Grey Knights and Draigo's in particular may carry, the chances of the High Lords taking any meaningful action against a First Founding chapter are miniscule, and the Dark Angels are the '''FIRST''' of the First Founding, which only increases the un-likelihood. Especially with complete lack of evidence other than the word of an interrogated traitor who has every reason to sow as much dissent as he can. Many would likely see such actions as defying the will of the Emperor himself, and they wouldn't be unjustified for believing so. The only reasonable conclusion that can be drawn is that Draigo is [[TTS|high on narcotics]].  Plus, screwing with Imperials to get to traitors and punish them isn’t exactly something the High Lords would be bothered by. They’re a bunch of fanatics, too.

So yes, the Grey Knights ''"should"'' already be aware of the touchy history of Caliban, but for all intents and purposes, they don't care or haven't actually figured out what it all means yet, and to be fair, for all the memes, the Dark Angels are able to keep secrets in a way that even the Alpha Legion could admire. Kaldor Draigo never actually claimed to know about the Fallen or about what happened on Caliban. In fact at the end of the Pandorax campaign, Draigo is seen screaming in Azrael's face demanding to know who these mysterious prisoners are and why the Dark Angels are so interested in them. Though to Azrael's credit, he ''actually'' doesn't have a clue why Draigo is so upset, since the Dark Angels didn't actually know about the particular Fallen Angel in question, who turned out to be an [[Zahariel#Not_Cypher.3F_If_then_Who.3F|original]] Grey Knight Founder and was kidnapped by [[Abaddon]] instead.

At the end of the day (or the Imperium, as fluff would have it) it's hilarious. In a [[grimdark]] laugh-or-you'll-cry sort of way. But also almost justified, as the Inquisition have ex-communicated [non-First Founding] chapters for less before.