Avenger's Gambit

The Avenger's Gambit was a dire campaign of slaughter carried out by the vile Chaos Champion Dematrius 'the Avenger' of the infamous Slaanesh-corrupted Forsworn Chaos Warband against the various Imperial worlds of the isolated Caligari Sector in the Segmentum Tempestus.

History
Dematrius, one of the few somber and bellicose members of the Forsworn, began to tire of the decadent inaction of Prince Arkann and led his great company of heretic Astartes upon a large raid into the infamous Caligari Sector of Tempestus. Known for being a harbor of heretics and outcasts, wracked by warp surges, Dematrius sought to either bolster his forces by subjugation or to sate his lust for death. Ruthless and gleeful to have his consciousness away from that of Arkann and his fervent supporters, the Avenger left Caligari when an army of mortals in the tens of thousands as well as ancient alien tech to fuel his planned war effort, with which Dematrius set upon pillaging and causing havoc across the Caradryan Sector, and did not return to Brightreach for a very long time.