Velk'Han - Establishment of Velk'Han Sept: The Velk'Han Sept is comprised of a cluster of worlds that have fallen entirely to the forces of the T'au, their Human populations turned from the Pax Imperium to the collectivist doctrine that is the Greater Good. Just how compliant the Humans are in this process depends on the world in question, for some resisted the coming of the T'au and fought for many standard years, while others threw down their arms at the first contact with a Water Caste envoy.The T'au's effort to insinuate themselves within the Jericho Reach is an unusual one, for it marks a departure from their well-established patterns of expansion and conquest. The T'au Empire has thus far expanded its holdings in concerted, species-wide efforts, the forces of a number of Septs spreading outwards to bring a new "sphere" of space within the T'au's influence and establish still more Septs within it.The Velk'Han Sept was established outside of this pattern, representing not an empire-wide crusade into surrounding space, but a single, concerted strike across the void towards a very specific, discrete region.The Jericho Reach is quite some distance from the dense stellar cluster in the Eastern Fringe occupied by the T'au Empire, and so it represented an impressive feat of voidsmanship for the T'au to even reach it, and a daring display of military skill to capture as many worlds as they did in such a short time.The T'au's interest in a region so far from their own domains was one of the main factors that caused the High Lords of Terra to declare the Achilus Crusade. In the aftermath of the abortive Damocles Gulf Crusade, the T'au not only retook the worlds they had lost to the Imperium, but exploited the momentum of their counter-advance to take hold of many more Human-owned star systems.Given the calamitous events that enfolded during the Battle of Macragge, few in the Imperium were overly concerned for the fate of a handful of frontier systems. Others, however, still brooded on the events of the Damocles Gulf Crusade, and were fearful of the T'au poisoning more sectors with their vile philosophies. It was these men, such as Confessor Gurney of the Ecclesiarchy, who warned of the perniciousness of the T'au and the danger of them being allowed to expand into worlds far beyond their empire.With the Jericho Reach accessible once more thanks to the opening of the Warp Gate, many great and powerful men swore that never again would the T'au or any other xenos species be allowed to pluck away Human worlds while the Imperium's gaze was turned elsewhere.What happened in the aftermath of the Damocles Gulf Crusade would not be repeated, it was promised. The T'au would not only be swept from the newly accessible Jericho Reach, but driven back to their empire by a vengeful Imperial Crusade that would not stop until a new front had been opened up against the T'au Empire itself.Fortunately for the T'au, they were sufficiently established in their new Sept to resist the initial advances of the Achilus Crusade, and the other belligerents active in the region diverted the Imperium's attention away from committing overwhelming forces against the Sept.Now, the T'au are engaged in an effort to eject the Imperium from the Greyhell Front. When this occurs, millions of sympathisers on the worlds of the Canis Salient will rise up against their oppressors and the T'au will push the Imperium all the way back along the salient and cast it into the depths of the Well of Night.