What is history: it is the echo of the past to the future, the reflection of the future on the past. - Hugo
Zhu Di, the fourth son of Zhu Yuanzhang. Relying on his own strength, he led his soldiers to seize the throne. Zhu Di's temperament inherited Zhu Yuanzhang, who was also a grumpy and vicious person. His throne was taken from his nephew Zhu Yunjiao. After Zhu Di ascended to the throne, he led his troops to personally march, five certificates of desert north, and all of them won a great victory, creating a prosperous era of Yongle. However, from the time Zhu Di's southern conquest to dismantle the Mongols, to the time when Zhu Qizhen was captured and When He was beaten to Beijing, only twenty-five years had elapsed. Who would have thought that the peace in the north that Yongle Emperor fought was quickly ruined by his own great-grandson. After this, the Ming Dynasty was seriously injured by the attack of the Wallachians, and it hurt its own foundation even more. So what exactly caused the rise of the Wallachians?
In fact, the most important reason for this, that is, the first reason, still has to start from Zhu Di's Northern Expedition.
During Zhu Di's first northern expedition, he dealt a heavy blow to the Tatar tribes, and made them begin to submit to the Ming Dynasty, and paid tribute to Ming Chengzu with many horses. However, when tatars were severely damaged, the Wallachians took the opportunity to develop and became a force that threatened the Ming Dynasty and made the Ming Dynasty's borders unstable.
The second reason is more like an accident.
In that year, Wala invaded the Ming border, and Zhu Qizhen was determined to follow the example of his great-grandfather Zhu Di in the Northern Expedition. This time, he went north with 200,000 soldiers and horses. At that time, Ming Yingzong did not have the need to carry out such an action, but his favored eunuchs, constantly stirring, made Ming Yingzong resolutely set out despite the advice of the ministers.
The imperial conquest was supposed to give the warriors confidence and let them fight bravely, but when he arrived at Ming Yingzong, he buried the lives of 200,000 soldiers. He also became a prisoner of The Wallachians and became a chip for the Wara to blackmail the Ming Dynasty. The economy of the Ming Dynasty was also hollowed out, and this civil change made the Ming Dynasty more crisis.