It is said that the Xuanyue Imperial Family has three main armies, each controlled by the current King Xuan Haoran, Crown Prince Xuan Jiuding, and Second Prince Xuan Jing.
Of course, the entire Xuanyue Empire belongs to King Xuan Haoran, and his decision to let his two most talented sons each create their armies is also a test of their abilities.
The army controlled by Crown Prince Xuan Jiuding is the same Xuantie Army that had many encounters with Yun Xiao in the past. Under the Crown Prince's command, the Xuantie Army has become the most formidable iron army of the current Xuanyue Empire.
As for the Jingyu Army established by Second Prince Xuan Jing, it does not have as much renown as the Xuantie Army, but even so, it posed a threat to Crown Prince Xuan Jiuding, who once viciously attempted to bring Xuan Jing down. Had it not been for Yun Xiao, his scheme would have succeeded.