Battle for Pharon

The Battle for Pharon was an Imperial castigation campaign conducted by the Zero Legion Space Marine Chapter against a coven of the treacherous Thousand Sons Traitor Legion led by the infamous Chaos Sorcerer Ahriman upon the feral world of Pharon.

History
Various reports of Chaos activity on the Feral World of Pharon had drawn the Zero Legion's 1st Division to investigate. When they arrived, they were met with a warband of the Thousand Sons Traitor Legion, led by the Chaos Sorcerer, Ahriman. After the first week of fighting, Zero Legion Scout Marines discovered that Ahriman's goal was to awaken a sleeping Chaos Imperator-Class Titan, which had been damaged during the Horus Heresy. Worse, the Chaos Sorcerer had planned to merge the Titan with a Daemon of Tzeentch to turn it into a Daemon Engine.

Acting quickly, the Division immediately launched a spearheaded assault towards the Titan's resting place, which was buried deep underground and thus protected by orbital bombardment. Unable to push back the large abundance of Thousand Sons Rubric Marines, backed up by Chaos Sorcerers, the Zero Legionaries instead weakened the ceiling above the Titan, thus making it vulnerable to the Division's ships. With the target now in sight, the Commander of the Zero Legion's fleet ordered a devastating orbital bombardment upon the Chaos Titan, destroying it and the Thousand Sons forces. However Ahriman and a handful of his servants escaped somehow.