The 8th Founding of Space Marine Chapters allegedly occurred during the mid-34th Millennium, undertaken amid the dark times of the Nova Terra Interregnum, when the Imperium of Man had been split into twin interstellar empires. Denouncing the High Lords of Terra, the Ur-Council of Nova Terra claimed rule over the Segmentum Pacificus. This period of divided rule lasted for nine standard centuries. Few records remain surrounding this Founding, but one of the earliest extant records likely to pertain to one of the Chapters Founded during this period is the Mantis Warriors which can be found in the Libris Gloriana -- a 777 volume treatise on the state of Imperial power commissioned for the ascension of High Lord Gogol after the Nova Terra Interregnum in 093.M36. It mentions in bombastic terms a Chapter of the Adeptus Astartes that is a "... warrior legion of the Mantis (or 'prophecy', the language is unclear)" of the 8th Founding (which would place its origins in the mid-34th Millennium) of "... the line of the great Khan, by his sons the Marauders." The text goes on to praise their successes in combating the Traitors of the Eye of Terror, as well as crushing alien threats, and speaks of them as operating far from home but fails to name their Chapter homeworld or state the star system in which it is to be found.
Select 8th Founding Chapters
- Imperial Armour Volume Ten - The Badab War - Part Two, pg. 64
- Imperial Armour Volume 12 - The Fall of Orpheus, pp. 17-18, 32-33