Prefectia Campaign - Shadowsun Triumphant: Buoyed by her initial successes, Shadowsun rapidly led her armies deeper into Imperial territory. She seemed to be everywhere at once, driving her forces onwards. At the forefront of the offensive, the Fire Caste spearhead were already en route to their next targets before the consolidation forces that followed hard on their heels had fully landed on the newly conquered planet. Here, Shadowsun was using the old Commander Puretide maxim: "Follow up a victory by striking quickly, and you will win another."As Shadowsun passed into the Imperium's interor she encountered ever greater resistance, and she saw that to overextend her forces would deplete the momentum of the attack. Instead of crashing headlong into well-defended planets, she split her fleets, scattering them to a dozen headings. Each began a devastating series of hit-and-run attacks against which the Imperium could mount no effective counter. At length, the Imperium settled into a static defence of a handful of their most key worlds. Shadowsun exploited this strategy too, for it allowed her to again marshal her forces together and launch a massive attack on the planet of her choosing. Her first target was the Hive World of Agrellan, a gateway planet to the Dovar System whose orbit safeguarded a rich cluster of Imperial worlds.Transports of fresh Fire Caste warriors and many of the newest Tau weapon prototypes were rushed to this battlefront for what would surely be a pivotal conflict. Aun'Va himself came to inspire the Fire Caste, and upon seeing him, the Tau knew their victory was assured. At last, the largest class of Tau Battlesuit was unleashed, and under Shadowsun's inspired leadership, its use proved a resounding success; everywhere one strode, victory followed. Fittingly, it was this new XV104 Riptide Battlesuit that delivered the killing blow during the final engagement -- laying waste to the massive Imperial heavy tanks that had so long blocked the gates to the world's capital hive city. Although the Imperial defenders fought with their usual fatalistic grit, it was not long before the hive corridors ran with blood and only a few isolated pockets of resistance remained. The planet of Agrellan, renamed Mu'gulath Bay by the Tau after it was integrated as a new Sept World, belonged to the Tau after only a single solar day of combat and soon the whole star system would follow. As such, among the other worlds added to the Tau Empire during the Third Sphere Expansion, three full new Septs were created: Ksi'm'yen, Fi'rios, and Mu'gulath Bay itself.Over the course of the war for Agrellan, Captain Kor'sarro Khan of the White Scars Chapter swore a blood oath that he would personally take Shadowsun's head from her shoulders. His hunt was remorseless, turning the speed and aggression of the White Scars to the solitary goal of destroying the mastermind behind the Tau's war machine. Kor'sarro Khan met Shadowsun in battle several times, engaging her in person at Acacia Hive and taking battle to her personal cadre at Blackshale Ridge. Despite his best efforts, Shadowsun survived, excelling herself in both strategy and tactics and proving a worthy opponent even in close quarters combat. Over time, however, the White Scars inflicted such horrendous casualties upon the Tau leader's personal cadre that he cool demanour was replaced by simmering fury. Perhaps overconfident after securing victory upon Agrellan, she soon took the bait offered to her -- the Knight World of Voltoris. There, she walked into a trap set around House Terryn's ancestral fortress. In the resulting ambush, Kor'sarro Khan wounded Shadowsun grievously, coming within a hand's breadth of decapitating her with his sword. Once more, however, she escaped. The Khan's great oath had yet to be fulfilled, and upon Prefectia, he would pursue it more determinedly than ever.