During his minority the governing authority was exercised by his grandmother, the Empress Changchi, the mother of the Emperor Suentsong. At first it seemed as if there would be a struggle for power between her and the eunuch Wangchin, who had gained the affections of the young emperor; but after she had denounced him before the court and called for his execution, from which fate he was only rescued by the tears and supplications of the young sovereign, the feud was composed by Wangchin gaining such an ascendency over the empress that she made him her associate in the regency. Unfortunately Wangchin did not prove a wise or able administrator. He thought more of the sweets of office than of the duties of his lofty station. He appointed his relations and creatures to the highest civil and military posts without regard to their qualifications or ability. To his arrogance was directly due the commencement of a disastrous war with Yesien, the most powerful of the Mongol chiefs of the day. When that prince sent the usual presents to the Chinese capital, and made the customary request for a Chinese princess as wife, Wangchin appropriated the gifts for himself and sent back a haughty refusal to Yesien's petition, although it was both customary and rarely refused. Such a reception was tantamount to a declaration of war, and Yesien, who had already been tempted by the apparent weakness of the Chinese frontier to resume the raids which were so popular with the nomadic tribes of the desert, gathered his fighting men together and invaded China. Alarmed by the storm he had raised, Wangchin still endeavored to meet it, and summoning all the garrisons in the north to his aid, he placed himself at the head of an army computed to number half a million of men. In the hope of inspiring his force with confidence he took the boy-emperor, Yngtsong, with him, but his own incompetence nullified the value of numbers, and rendered the presence of the emperor the cause of additional ignominy instead of the inspiration of invincible confidence. The vast and unwieldy Chinese army took up a false position at a place named Toumon, and it is affirmed that the position was so bad that Yesien feared that it must cover a ruse. He accordingly sent some of his officers to propose an armistice, but really to inspect the Chinese lines. They returned to say that there was no concealment, and that if an attack were made at once the Chinese army lay at his mercy. Yesien delayed not a moment in delivering his attack, and it was completely successful. The very numbers of the Chinese, in a confined position, added to their discomfiture, and after a few hours' fighting the battle became a massacre and a rout. Wangchin, the cause of all this ruin, was killed by Fanchong, the commander of the imperial guards, and the youthful ruler, Yngtsong, was taken prisoner. There has rarely been a more disastrous day in the long annals of the Chinese empire than the rout at Toumon.