The Tau are the youngest race in the galaxy. Before they were exterminated by the superior Humans 6000 years ago, a Warp storm enveloped their planet making it completely inaccessible. 6,000 years later, the Warp storm has moved on and Tau technology and society have advanced in leaps and bounds. They now have a small inter-planetary empire, uncorrupted by (and perhaps ignorant of) Chaos. They buid their empire on merciful and liberal ideals. They will soon learn. however, that the rest of the galaxy is not so forgiving. When they time comes, thankfully, their technology will keep them well equipped.