Battle of Kayarang (concept)
The Battle of Kayarang was the closing engagement of the Khayar Seldnii Darn. Taking place at the hills of Kayarang, the largest army ever raised by an Öltenic khatan at that point met with three full Banners of the Emperor of Kathun-Kai along with the militia of four different states. At the head of the Öltenic forces was Khatan Otached, while leading the Kathuni forces was Xaoi Yaung Zayang, the most formidable warrior of Emperor Xu Giang-Xu Yaon. Hoping to take advantage of the hilly terrain, Xaoi Yaung Zayang positioned himself for combat at Kayarang while he had one of his generals, Huo He, lead a full Banner to engage the Öltenic horde, then feign a retreat to Kayarang.
Otached and his horde pursued the retreating Kathuni, where they were ambushed by Yaung Zayang's forces. In the ensuing battle, both Otached and Yaung Zayang chanced upon each other in combat, though some records romanticize this and claim that they challenged each other to mortal combat, breaking the fighting and obeying the proper rules of dueling. In the chaos of the combat, both of their legendary swords clashed and produced an explosion which desolated not just Kayarang, but its parent state of Cheyyungjei as well. While Yaung Zayang and Otached survived, only a few hundred of their combined forces were left alive at the end of the battle.
Otached later went on to unify the Öltenis under his banner, using the legend of his sword - the Iorne Seld - to bring most of the clans under his banner. Yaung Zayang, meanwhile, left the Emperor's service in shame and wandered the world as a Xaouxae, a sort of wandering mercenary swordsman, taking with him the legendary Eyon Faeng. Huo He, another survivor, committed suicide in order to protect both his honor and the honor of his family. The battle has lived on in infamy for both the people of Kathun-Kai and the Öltenic nomads, though in Öltenic versions of the tale it is portrayed more romantically.