Editing Exterminatus (section)

===Tau Empire===
While the [[Tau]] almost certainly have the technological capability to destroy entire planets (if the fucking Orks can figure it out without having to build back up to Krork, then the Tau probably at least gave it some thought), there are a number of philosophical, political, and strategic reasons that they would avoid doing this in all but the most extreme circumstances.

For one, the Tau Empire is in the process of expanding, and it isn't exactly conducive to your expansion efforts to blow up perfectly colonizable worlds; thus the Tau would likely see Imperial Exterminatus orders as an egregious waste of resources. Also, the Tau are arguably [[Grimdark|the only race in the 40k universe]] who operate by something parodying a moral compass that is beyond survive at any cost, so the idea of obliterating a planet and its inhabitants is likely appalling to their [[Noblebright|naive wittle sensibilities]].

On the other hand, the Tau have officially declared some races (Orks, Tyranids, Dark Eldar, and Necrons) "lost causes" to be destroyed wherever encountered, so one could plausibly imagine a situation hopeless enough that they would sacrifice a planet to be rid of them. Still, they would probably try to at least leave the world itself salvageable and only exterminate the infesting species. This might not be a concern on a lifeless rock that happened to be a Necron tomb world, however. There are stories of populations being sterilized or generally dispatched, which is about as mean as the Tau get; one such case was the Poctroon, who were the first sapient species they ever encountered. Their planet was ripe for colonization, and when the Tau arrived, the Poctroon all died of a 'mysterious' contagion, though the Tau obviously have admitted no diabolical fuckery.

As their expansion accelerated deeper into Imperial space, the Tau started to deploy more and more experimental technologies to both battlefields and production lines, some of which weren't properly tested. As a result, quite a few moons, planets and even stars have been accidentally destroyed by various mishaps. While such destruction sometimes happened to be advantageous to Tau forces (for example, by shattering Imperial defences with massive tidal waves and earthquakes after the destruction of a planet's moon), they have shown no attempts to weaponize it.

The Tau also have orbital high-yield nuclear warhead options, but they generally use them to generate EMP pulses to blackout a wide area. They can also use these warheads to scatter toxic radiation over an area instead, though, burning through flesh and killing those below.

The Tau are also one of the few factions in 40k who still possess functioning terraforming technology (the Eldar lost theirs during the [[Fall of the Eldar|Fall]], Tyranid "terraforming" is more just them going about eating everything, and Necron terraforming is an Exterminatus on its own), so they can restore exterminated planets to habitability again, provided they haven't been utterly destroyed Deathstar-style. So yes, [[Meme| in the Tau Empire, Exterminatus get purged by YOU!]]

One of the notable examples would be [[Commander Or'es'Ka]] from [[Dawn of War|Dawn of War Soulstorm]], where he had this huge ass gun called "Ar'Ka Cannon" installed on the moon of Kaurava II. The cannon can fire anywhere in the Kaurava system (including the moon where the cannon is), obliterating any enemies before the main force moves in. The said [[ork|BIGGIZT GUNZ]] is also the most Eco-friendly WMD ever built in the grimdark future, as it is capable of damaging only advanced life forms while incapable of harming plants and buildings.