The one who betrayed was General Meng, aged twenty-six, who had been imprisoned for three months. He was a commander in the Left Wing Army. Two months before his capture, his father, Old General Meng, violated military orders, leading Xie Zhang into an ambush where he was gravely injured. Nearly five hundred Ningzhou Iron Cavalry troops were lost. Marquis Zhenbei hesitated in dealing with the matter of Old General Meng. Firstly, the old general was his loyal subordinate who had followed him for many years, and Marquis Zhenbei's brothers-in-arms under his command were already dwindling in number. Secondly, the old general had unparalleled military merits, and the marquis had considered balancing merits against faults.
