Why did Tang Taizong think that the pro-occupation of Koguryo was a failure?

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Why did Tang Taizong think that the pro-occupation of Koguryo was a failure?

2019-02-18 18:32:54 190 ℃

In the eighteenth year of Zhenguan (644), Emperor Taizong of the Tang Dynasty conscribed Koguryo. From the military point of view, Taizong of Tang Dynasty won a brilliant victory in his own march against Koguryo, commanding 150,000 elite Tang troops to defeat more than 300,000 Koguryo troops, capturing countless and almost wiping out the main force of Koguryo.

But it is strange that Tang Taizong, who had won a great battle, believed that the conscription of Koguryo was a major failure after his accession to the throne. Some shameless people even described the conscription of Koguryo as "black history" like flies. What's going on here?

First of all, although the military victory was achieved, Tang Taizong's conscription of Koguryo did not achieve the strategic goal. Tang Taizong was an emperor with very strict requirements. Even if he won the battle, he would not blow the war that failed to achieve his goal into "perfect martial arts".

Secondly, Xuanling, a famous Xiangfang, once commented that the conscription of Koguryo by Emperor Taizong of Tang Dynasty was "small and harmful", which was also the general view of the ministers of the Tang Dynasty at that time. Tang Taizong was an emperor who attached great importance to ministers'opinions. Naturally, he agreed that his Eastern Expedition was a failed war.

Finally, similar to Emperor Yangdi of Sui Dynasty, Taizong of Tang Dynasty also wanted to destroy Koguryo. However, unlike Emperor Yangdi of Sui Dynasty, Taizong of Tang Dynasty, after his first failure to conscript Koguryo for nothing, did not pretend to be wrong or taboo medical treatment, but decided to face up to his shortcomings and sum up his experience and lessons.

p> In order to make ministers speak freely about the question of the expedition of Koguryo, Emperor Taizong of the Tang Dynasty showed the court that the expedition of Koguryo was a failure by remembering the Wei Zheng. The Minister of Tang Taizong did find the right way, which laid the foundation for Gaozong to eliminate Gaogouli later.