I have updated the official Tau timeline with the following entry, taken from the new Codex: Necron
New timeline entry wrote:
813.M41 - The Fall of Cano'var
At Nemesor Zahndrekh's instruction, the armies of Gidrim invade the Tau world of Cano'var, routing the planetary defenders after two weeks of campaigning. Subsequently, a demi-company of White Scars led by Kor'sarro Khan lands on Cano'var, intent on prosecuting a punitive strike against the planet's former occupants. Almost all of the White Scars Marines are slain on Uzme Plateau, but Kor'sarro Khan survives and is imprisoned in Zahndrekh's subterranean court. Kor'sarro Khan works with other prisoners, including the Eldar Ranger Illic Nightspear, to plan an escape. Eventually, Kor'sarro Khan and Illic Nightspear are able to escape using a still-functioning Tau craft. (Codex: Necrons - 5th Edition, 25)
Furthermore, we now know that Anrakyr the Traveller participated in the Harvest of Ka'mais, in 902.M41.
Codex: Necrons - 5th edition, p. 62 wrote:
I am not capricious, nor am I given to cruel acts for their own sakes. It is simply that you and your kind have trespassed, and thus invited extermination. Curse you for putting me into this inconvenience.
-- Anrakyr the Traveller to Tau Ethereal Aun'taniel, prior to the Harvest of Ka'mais
Given Anrakyr's fervent desire to awaken slumbering Necron worlds, and his expressed belief that the Tau have "trespassed", it's safe to conclude that Ka'mais was once a Necron world.
However, this raises a new question -- why did Aun'taniel behave so naively in the face of the Necron threat? Before the new Necron codex gave rise to different Necron factions, it had seemed that the Harvest of Ka'mais was the Tau's first encounter with the homogenous, omnicidal Necrons; how else to explain the Tau's complete naivety? Now, however, Aun'taniel's actions imply that Cano'var's destruction was either not attributed to the Necrons;2
or that the Tau have come to realize that Necrons fight in disparate and often contradictory factions, and that Aun'taniel chose to interpret Anrakyr's intercession at Ka'mais as the benevolent action of a previously-unencountered Necron actor.
Two last pieces of information:
-- Rumors of Imotekh the Stormlord's growing might have reached the Tau, "though, as ever, their prevailing interpretation is one of opportunity, rather than threat." (p. 55)
-- Trazyn the Infinite uses mindshackled cat's-paws to make deals "on Ork-held planets, Tau Sept worlds, and human colonies." (p. 58)
I have gone through Codex: Grey Knights
and Codex: Blood Angels
, but found no mention at all of the Tau. If I missed anything, please alert me with a private message. I have yet to acquire Codex: Dark Eldar
, and do not know if there is any mention of the Tau. Edit: many of you have noted that Codex: Dark Eldar
does have several pages of Tau fluff. I'll look into it!2
Alternatively, information concerning Cano'var's destruction was suppressed to the point that a century later, Aun'taniel was not privy to information concerning the colony's fate.