Board Thread:Warhammer 40k General Discussion/@comment-71.91.63.134-20150920063835/@comment-8881468-20150921072702

if the tyranids were in the mily way galaxy, then they had been there for millenia prior to the horus heresy and the emperor actually really doing stuff. As is pointed out by the  presence of Ymgarl genestealers, the brood  in the cain novel  and the link that some scholars make between fenrisian krakens and the nids.

aka: Empi did not know jack shit about nids.

2. The legions were destroyed before the horus heresy as is pointed out by evidence in the course of the horus heresy materials.

example 1:  Deliverance lost: Corax is primarch 19, yet when he akss about his brothers, he is told that he only has 17 and that the missing 2 is a sad story for another day.

example 2: the burnign of prospero: leman russ tells kaspar hauser that space mnarines had fought space marines before and that the executioner of the emperor and his space wolves have censured other lewgions before.

examnple 3: Horus heresy book I think it is massacre or betrayal, it includes a timeline with 2 actions without further information given,  of the space wolves ~ 30 years before the heresy.

example 4: from First heretic: "I fear the Emperor will break the Word Bearers - and break me. We would be cast alongside the brothers we no longer speak of."

example 5: fear to tread : "You know the reason! [...] I will not be responsible for the erasure of the Blood Angels from Imperial history. I will not have a third empty plinth beneath the roof of the Hegemon as my Legion’s only memorial!"

problems:

1. the primarchs actually knew about the malign forces of the warp/chaos. (see horus and the assault on the whisperheads in "horus rising" unlike knowledge about the nids.

2. Ordo Xenos has only circumstantial evidence that goes back to m 35

3. Tyranids move towards the psychic beacon of the astronomican and they move at very slow pace,how should emps have known that his actions are the reason for the coming of a species that is only viewable in the wap by the shadow in the warp--> unclear, 2. that he ahs no knowledge about whatsoever

4. if tyranids had entered the milky way before the heresy, they would have been known to the space marines and the imperial guard, as they would have had advance scouting crfeatures like lictors and genestealers in ther  galaxy. however: genestealers were found as new unique species on ymgarl, 200 years prior to hive fleet behemoth and not seen as part of the tyranids. and genestealers would have been a threat longer than they were, and would have been known to all legions and chapters, as securing space hulks is one of the tasks that the marines are "routinely" called for.