Yong-le: Year 19, Month 1, Day 6
7 Feb 1421
On this day, the Commissioner Shi You, who had been despatched by the Feng-cheng Marquis Li Bin, regional commander of Jiao-zhi, to pursue the bandits Pan Liao and Qin Ze, arrived at Yu-ma Subprefecture. At this time, Liao had gone into Laos to borrow soldiers while Ze and other rebels did battle at Nong-ba-lin. They used elephants to charge the Imperial army, but the Guard Commander Zhang Ming and the Battalion Commander Zhang Ben struggled through the bandit ranks and fired at the mahouts. Subsequently firearms were used to attack them. The elephants turned and fled and the bandits scattered in disorder. Over 100 heads as well as 30 prisoners were taken. Ze's younger brother Jie and the 20 men he led surrendered.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 14, page 2248/49