In the history of the Ming Dynasty, Emperor Yingzong Zhu Qizhen was the only emperor captured by foreign enemies. During his reign, internal conflicts within the country intensified and external threats became increasingly serious. Eventually, he was captured by the leader of the Wala tribe, Yeshen, in the "Tumu Fort Incident". However, surprisingly, Yeshen did not kill him, but chose to let him go back. So, why did Yeshen make such a decision?

Firstly, we need to understand the war background at that time. At that time, the war between the Ming Dynasty and the Wala tribe had entered a heated stage. Yeshen captured Emperor Yingzong hoping to defeat the Ming Dynasty completely with this opportunity. However, the Ming Dynasty did not collapse because of this. Instead, led by Emperor Yingzong's younger brother Zhu Qiyu, they quickly organized effective resistance.

Secondly, Yeshen was also a shrewd politician. He understood that killing Emperor Yingzong might provoke rebellion among the people of the Ming Dynasty, which would be disadvantageous to the Wala tribe. Moreover, he also appreciated Emperor Yingzong's charisma and ruling ability, hoping to control the Ming Dynasty by controlling him.

Finally, Yeshen released Emperor Yingzong out of confidence in his own strength. He believed that even if Emperor Yingzong was released, it would not change the Wala tribe's dominant position in the war.

However, the development of the situation did not go as Yeshen wished. After returning to the Ming Dynasty, Emperor Yingzong regained the throne, but the actual power had already been taken over by his younger brother Zhu Qiyu. The Wala tribe also gradually declined in the subsequent wars and was eventually eliminated by the Ming Dynasty.

Overall, Yeshen's decision to release Emperor Yingzong was based on his judgment of the war situation and confidence in his own strength. However, this decision did not change the Wala tribe's defeat, but accelerated its decline.

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