Kargyllan Wars

The Kargyllan Wars was an Imperial xenocidal campaign carried out by the unforgiving and merciless Destroyers of Worlds Space Marine Chapter against invading T'au Empire forces upon the Imperial world of Kargyllan.

Background
If anyone wishes to hear how bloodthirsty the Kshatriya can be, they need only look at the fate of Kargyllan. In 800.M41, the T'au annexed the world and assimilated its humans, taking a strategically important location from the Imperium. In response, a large Imperial force was formed consisting of the Mordekaisers, Star Phantoms, several Astra Militarum regiments and, of course, the Destroyers of Worlds. However, due to a warp turbulence, only the Destroyers of Worlds arrived. This did not deter the Horde, who arrived in Chapter strength. Though an entire world stood against them, this would only be a mere challenge. The Kshatriya's Thuggee and scouts sank into the forests and underlevels of the cities. Soon, reports of officials' being found strangled to death emerged and infrastructure was sabotaged. Then the rest of the Horde emerged, their lightning assaults and hit and run attacks left trails of destruction behind them as the equally mobile Fire Caste struggled to match the bloodthirsty speed of the Kshatriya.

Eventually, the T'au were supposedly able to outmaneuver the Kshatriya and encircle them in the plains. Yet it was they who were outmaneuvered as the Destroyers' of Worlds most fearsome warriors, the Rakshasa, teleported right into the xenos' ranks and began a brutal slaughter of the unprepared Fire Warriors and gue'vesa conscripts. With the Rakshasa's sudden appearance and the Raja personally tearing the Ethereal limb from limb, the T'au are easily broken and overwhelmed. What's more the battle claimed much of the present Fire Caste, leaving the Kshatriya free to commence a rampage. The xenos and their human allies surrendered, a plea that fell on deaf ears as the Kshatriya burned their cities down and slaughtered T'au and human alike.

When the rest of the Imperial force arrived, the Kshatriya had already departed. What they left was a field covered in corpses, xenos and human, impaled on stakes, as a warning to what happened to those who fought against the Destroyers of Worlds.