Purge of the Zhau Sector

The Purge of the Zhau Sector was an Imperial xenocide-castigation campaign carried out by the unforgiving Lightning Wraiths Space Marine Chapter against an unknown Drukhari raiding fleet, to cleanse their foul presence from the Zhau Sector.

Background
A Lightning Wraiths arrived at the Zhau Sector, which was located at the edge of Segmentum Obscurus, after receiving news of Drukhari presence. Upon arrival to the sector, they immediately detected the xenos' ships near a feral world. Without any delay, the Astartes fleet barrelled towards the xenos at full-speed and when they were finally noticed by their prey, the closest Drukhari vessels were harpooned to Astartes frigates so that they may not escape. Thanks to the harpooning, the Astartes of the Lightning Wraiths were able to board the xenos ships and wreak havoc from within. Some of the ships managed to cut off the harpoons before Lightning Wraiths boarding parties could land and made their escape. Those were not fortunate enough were either slaughtered to the last living being or bombarded until their ships were naught but ash.