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'''Gravalax''' is a minor [[Agri World]] in the [[Damocles Gulf]] region of space. It is an [[Imperial ]] world surrounded by Tau controlled space. It has been described as being of no strategic value. In 931.[[M41]], the [[Tau]]'s plan to annex it peacefully was disrupted by riots and civil War amongst the population, caused by the arrival of a Division of [[Imperial Guard]]-controlled space.

In 931.[[M41]], the [[Tau]], who had established a trading mission on the planet, were making overtures to the [[Governor]], and had become highly popular among the planet's citizenry. This led to what became known as the [[Gravalax Incident]]. Although Gravalax itself was of no strategic value, the [[Imperium]] refused to allow the Tau to make any further inroads into Imperial territory. On the other hand, the Imperium was painfully aware that provoking open war with the Tau would waste military resources that were desperately needed in other theatres. The planet is also noteworthy for being the place where [[Commissar]] [[Ciaphas Cain]] and the female [[Inquisitor]] [[Amberley Vail]] from of the [[Ordo Xenos]] investigated on '''Gravalax'''first met and began their long association.

* [[For the Emperor(Novel)]] one of the - [[Ciaphas Cain: Hero of the Imperium (Omnibus)]] novels by [[Sandy Mitchell]]