Pretty sure the Sisters of Battle and the Grey Knights never interacted during those events, the sisters were only there to recover sacred relics, once done they left. The Sisters left the planet as the Grey Knights showed up and bombed the planet from orbit. Pretty sure the Grey Knights never went to the surface, just showed up, Exterminatus, left. If there was any interaction at all, it was likely no more than an acknowledgement of each other being in the same system over communications.
Source? I know ADB is a wee bit unsure about FFG, but with how loose canon works they seem just as 'empowered to create IP' as the other three. Not to sound confrontational, but i'v run into the same thing as people who say the Codex takes precedence over novels when they plainly don't. Edit: Ah here we are.... "Part of the problem is that 40K lore is essentially divided into 3 sub-companies all producing material, and as with all things, quality, themes, perceptions and intentions can be completely different. Games Workshop produces the games and core setting lore, with 30ish years of history, releasing a couple of sourcebooks a year. Black Library is the publishing arm, mostly centred on novels, and still very new in terms of producing canon. The third is Forge World, an allied design studio and miniature production company. Note: An even more recent addition is Fantasy Flight Games, who produce the 40K roleplaying game, but even now, I’m not sure just where they stand. Like I said, this is a complicated hellhole of treachery, madness and deceit. As it stands, the official line is that there are three factions empowered to “create IP” (an exact quote), and that’s GW, BL and FW. Given that the 40K RPG is mostly made by folks working in or around the main three companies, I think it’s fair to say that its lore counts as canon, too."
the huge problem is that all the videogame company are equivalent of FFG: they are licensed and work around the 3 company and have approved material. that will make canon the EC armor that regenerate in 2 seconds, lascannon that need a target for fire etc etc FFG like videogame company adapt the lore to the pen and paper rpg format and do the necessary balance/addiction for make it playable.
Well yeah, but the Codexes do the same thing to tabletop. Would that make Novels the only 'true' source of lore then?
when a licensed product go against a codex or another not licensed product clearly the non licensed product prevail, because is clearly more verified and checked respect a licensed product. also novel can need to adapt lore to the narrration. why the codex is considered prevalent? because is the core of the setting: like the main source of lore for star wars are the movie the main source of lore for war 40k are the codex
But that's not how loose canon works, and indeed it's a little silly to think of it in those terms. All of them are operating in the Warhammer universe and under loose canon they are 'equal' rather then having tiers like star wars. Especially when the people who work on said product or the same people who work on the other product, and since both products are 'altered' to fit a game format then it's only logical that the victor is pure preference.
I'm fairly certain that this lore validity ranking system only exsists in the minds of fans that insist it exsists. If I recall GW policy is it's all to be taken with a grain of salt.
I actually rather like it. Of course no one knows what's completely true in this universe, and why should they? even talking to people on another world requires sailing through hell.
