There is a famous national manifesto in the Han Dynasty: "It is advisable to hang the barbarian mansion in Toucha Street to show Wan Li. Those who openly commit crimes against the Han people will be punished far away! " Today, this sentence still stirs our hearts. As we know, although ancient China existed as the most powerful suzerain in East Asia for a long time, there were still numerous strong enemies around it, such as Xiongnu, Qiang, Turkic and Tubo. ......
After the Huns were beaten to pieces by the Han Dynasty, there was a history of "Five Chaos" and the opposition between the Northern and Southern Dynasties. It was not until 58 1 year that Emperor Wendi of Sui Dynasty established the Sui Dynasty that the land division in China gradually ended. However, there are still Yi people engaged in espionage activities around the Sui Dynasty, and Turks and Koguryo people are a threat. The Turks almost took the Emperor Yang Di away; Koguryo refused to be friendly and harassed the northeast border from time to time.
Wendi once sent troops to attack Goguryeo, and Goguryeo pretended to surrender, so Wendi withdrew. However, during the period of Yang Di, King Gao Yuan of Koguryo violated this ceremony and provoked him many times. Emperor Yang Di recruited civilian workers from all over the country for three times and attacked Koguryo on a large scale. He was determined to give this country, which had occupied Liaodong Peninsula for a long time, a little color to see, lest they think that the Central Plains dynasty was easy to bully.
However, Yang Di failed to solve Goguryeo's problem. On the contrary, he was too impatient, which led to the turmoil in the Central Plains. After the uprising army perished in the Sui Dynasty, two emperors, Tang Gaozu and Emperor Taizong, set out to restore the vitality of China. Frequent wars at the end of Sui Dynasty led to a sharp drop in the population of Central Plains to two million households. Seeing this scene, Goguryeo refused to accept the goodwill of the Tang Dynasty, but instead began to plan to further occupy Liaodong and take the people into slavery.
Most of these people who were forced into slavery by Koguryo were former soldiers. They were forced to join the army by the power of Emperor Yang Di, some were buried in a foreign land, and some were captured. During the period from 632 to 643 AD, Emperor Taizong sent people to Koguryo many times, and the emissary found that Koguryo piled the bones of soldiers killed in the Sui Dynasty into hills on the battlefield and showed them off to the emissary.
And along the way, there were even "Sui people cried all over the countryside". These are all captured soldiers that Koguryo surrenders to the Sui Dynasty on a pretence and promises to release. Seeing that the Sui Dynasty was too busy, Koguryo detained them and made them slaves forever. After learning about the situation, Emperor Taizong decided to personally levy: "If I send tens of thousands of troops to attack Liaodong, I will surely destroy the ugly people in Dongyi and save my people from fire and water!"
Emperor Taizong announced to the world that he was determined to recover Liaodong, a land belonging to China, and vowed to avenge Koguryo's order in the Central Plains that "father, brother and children should not meet each other". He ordered his subjects: "Whoever wants to destroy Korea for the emperor will follow him to the scene!" As soon as this statement came out, the northeast people who had been troubled by Goguryeo for a long time shouted the slogan "I don't want a reward from the county magistrate, I will die in Liaodong" and vowed to follow it.
However, Emperor Taizong only recruited those who were willing to fight, instead of using the power of people all over the world as Yang Di did. Zhang's 40,000 soldiers and horses, Li's 60,000 soldiers and horses, together with the 3,000 soldiers and horses recruited by Chang 'an and Luoyang, and the conference semifinals who defected, all followed Emperor Taizong to Liaodong. When I heard that the emperor of the Central Plains personally came to levy, Koguryo was frightened and closed the city one after another.
Emperor Taizong personally climbed to the top of the mountain with Sun Chang Wuji to inspect the terrain and sucked blood for the wounded soldiers. In the end, Tang Jun irresistibly recovered Liaodong, captured 40,000 Koguryo people, rescued more than 70,000 people, and moved 70,000 people from Liao, Gai and Yan countries to China. In this war, Tang Jun achieved remarkable results with little loss. From then on, Goguryeo never dared to provoke Datang easily, and her strength was greatly weakened.