Fluff Tidbits from Codex: Deathwatch
"The Eye of Damocles is a vast watch fortress that monitors the borders between Imperial space and that of the usurper Tau Empire. Its Kill Teams specialise in vertical assault. Dominatus teams will often strike from Corvus Blackstars to turn onesided firefights into bloody melees."
"THE ENCLAVES STRUCK - With Commander Farsight and his subordinates joining the war for Agrellan, the Deathwatch make an opportunistic attack on the Farsight Enclaves. They cause untold damage on the Enclaves’ command structure before Commander Farsight returns, vengeance foremost on his mind."
From Codex: Genestealer Cults
"THE GREATER GOOD CORRUPTED - A lone Genestealer from Hive Fleet Gorgon reaches the Tau sept world of Ksi’m’yen. The creature is captured by the planet’s Earth caste scientists and subjected to extensive analysis, resulting in a lowly worker being implanted with a measure of germ-seed. The grotesque anatomies that spring up in the laboratories are seen as curious rather than blasphemous by the ever-inquisitive Earth caste, for the Tau approach to alien life forms is founded on the concept of acceptance and tolerance. When the research divisions experience a bloody schism twenty years later, the Fire caste are called in, only to find many subterranean research facilities overrun. Ksi’m’yen is consumed by war, and quarantined for almost ten years before the eccentric Ethereal Aun’ghol declares it productive and clean.
Unfortunately, there are no dates.