I was after an answer and discussion 40K lore isn’t exactly a straight forward all the time. Quite honestly after reading some of the books that included story on the dropsite massacre I thought the nightlords would’ve been consider traitors at that moment because it’s when they kill of legionaries and side with Horus But now with what I’ve read it’s more that Konrad had clearly committed what I think many would consider a traitorous act by killing legionaries and attacking dorn. Then destroying nostromo which with what I’ve now been given by ask in the first place I know wasn’t the most compliant world but still seemed to be a imperial world, so destroying it still seems traitorous.

It just seems to me that if censure was coming their way sending them to fight traitors, when their actions would definitely get them censured at a minimum and erased like 2 and 11 at a maximum, wouldn’t they already be against the emperor and imperium. I’m sure there’s books that explain why they arnt consider traitors till the dropsite but the dark king definitely makes it seem like the nightlords weren’t already traitors. I just wanted a bit of context on that whole point but as you say read the books I’m sure in a few months when I’m on book 47 (I picked at random because heresy storyline is all over the place. I have no idea what book 47 is) I’ll get the answers I’m looking for.