Coroxian Crusade

The Coroxian Crusade was a crusade against the Chaos controlled system of Coroxia and other select surrounding systems and planets. The Crusade lasted 84 standard Terran years and ending in a decisive Imperial victory. The Crusade was won after the 2nd Captain of the Chapter slew the leader of the Cult of the 7 Arms, Amet Volupte.

History
Once the system of Coroxia had been unresponsive to the rest of the Imperium for a sufficient amount of time, a small amount of the Argent Leviathans Space Marine chapter was sent to investigate and destroy any dangers to the system. Upon arriving in the Coroxian system, they discovered a system-wide rebellion had occured and that the entire system was under control of a chaos cult called the Cult of the 7 Arms.

Battle of Coroxia Tetriaris
Upon arriving in the system, the closest planet was the Agri World of Coroxia Tetriaris. Upon getting within orbit it became noticable that most of the agricultural estates of the planet had been burned to the ground, the only light emanating from the planet was coming from the capital city of the planet.

Due to the vox hails sent down to see if any PDF forces remained were left unanswered, the 3 companies began the assault with a 2 day orbital bombardment of the capital city and surrounding settlements. After the bombardment was ended, the bulk of the 3 companies were sent to 3 different locations around the capital, surrounding it, while individual squads were send to suppress any chaotic ideoligy in the surrounding settlements.

The battle was swift as the Leviathans preferred, as they surrounded the city to methodically destroy any resistance in their way while a small squad infiltrated behind enemy lines to kill their leader. After infiltrating enemy lines with his squad, 4th Princeps Doran Orterro quickly made his way to the Governors Palace, where it was suspected the chaos leadership was located. Upon entering the palace, the squad would meet heavy resistance from heretic Astartes before finding the leadership of the chaotic forces in the middle of a ritual. Due to the heretics being distracted, Orterro and his squad were able to kill them easily. To this day the purpose of the ritual is unknown, however it is suspected to have involved daemonic summoning.

Upon killing the leadership, the rest of the forces were able to make their way through the city and kill the remaining cultists. After finishing the fight, the Astartes decided to leave the politicking to the mortals and decided to move on to the next planet.