Zhengde Emperor
Then in 1517, the Zhengde Emperor gave himself an alter ego named Zhu Shou (朱壽) so he could relinquish his imperial duties and send himself off on an expedition to the north to repel raiding expeditions several tens of thousands strong led by Dayan Khan. He met the enemy outside the city of Yingzhou and defeated them in a major battle by surrounding them. For a long period of time after this battle, the Mongols did not launch a raiding expedition into Ming territory. Then again in 1519, the Zhengde Emperor led another expedition to Jiangxi province to the south to quell the Prince of Ning rebellion by a powerful prince known as Zhu Chenhao who had bribed many people in the emperor's cabinet. He arrived only to discover that the revolt had already been put down by Wang Yangming, a local administrative officer. Frustrated at not being able to lead his troops to victory, the Zhengde Emperor's advisor suggested they release the prince in order to capture him again. In January 1521, the Zhengde Emperor had the rebel Prince of Ning executed in Tongzhou, an event that was recorded even by the Portuguese embassy to China.