Back and forth of Emperor Taizong's expedition to Korea

Imperial envoys used imperial edicts to order North Korea to withdraw its troops, and Quan Gai refused Tang envoys, so Emperor Taizong decided to go to war. In the 19th year of Zhenguan, Emperor Taizong led six armies to crusade against North Korea, leaving the prince in Dingzhou to supervise the country, regardless of the prince's earnest persuasion.

Tang Jun went deep into Korea, attacked the city all the way and was invincible. Not long after, he attacked Ancheng in North Korea. Because of the struggle of the guarding city master, Tang Jun was then deadlocked.

Because Taizong was blindly optimistic before the war, he did not make full preparations for the war. The front line was too long and the road was far away, especially when the western Liaoning corridor was still a swamp, and the rear transportation line could not be guaranteed.

At the same time, the weather is getting colder and colder, which is not conducive to combat. In September of the same year, Tang Jun almost ran out of food and grass, so Emperor Taizong had to withdraw by imperial decree.

Extended data:

Emperor Taizong regretted waging this war, saying that if Wei Zhi were still alive, Wei Zhi would definitely dissuade him from waging this war. After the death of 643, Emperor Taizong suspected that he had formed a party with Hou and Du and destroyed the tomb written by himself.

After confession, Li Shimin ordered the reconstruction of Wei Zhi's tomb, and summoned and rewarded Wei Zhi's widow and children.

On the way from Dingzhou to Bing (now Taiyuan, Shanxi), Li Shimin fell ill and returned to Chang 'an after practicing in Bing for several months. After Emperor Taizong returned to Chang 'an, he handed over the general political affairs to Prince Li Zhi.

Some historians believe that Emperor Taizong was injured in the siege, but there are different opinions about what the injury was. /kloc-a poetry note novel of North Korea after the 0/8th century, saying that Emperor Taizong was shot by an arrow and hurt his eyes. There is no basis in history for the injury statement.

References:

Baidu Encyclopedia-The Battle of Destroying Koguryo in Tang Dynasty