What did Goguryeo do? Why did it attract a century of conquests in the Sui and Tang dynasties?

The ancient Goguryeo dynasty was not the Goryeo in the history of South Korea, but a powerful military kingdom occupying the Liaodong Peninsula and the Korean Peninsula. However, this kingdom has faced a huge crisis since its establishment. The crazy offensive from the Central Plains dynasty began with Emperor Yang’s conquest of Goguryeo until the demise of Goguryeo. The emperors of the Sui and Tang dynasties maintained military suppression on Goguryeo. Why did Goguryeo suffer the crazy blows from the Sui and Tang dynasties?

Goguryeo was founded by the Fuyu people. The Fuyu civilization they founded has a great influence on later generations. From the Korean peninsula to Japan, this narrow area is deeply influenced by the Fuyu culture. The place where Fuyu culture intersects with Chinese civilization is always in the flames of war. During the great chaos in the Central Plains, Goguryeo seized the opportunity to occupy Lelang County and Liaodong County, and included the area under Goguryeo's rule.

Due to the collision between the two civilizations, Goguryeo has become a nomadic and farming country, similar to the later Xixia. This system has a huge military advantage. All the people of Goguryeo are soldiers. With a population of one million, they can raise more than 600,000 troops. At the border of Goguryeo and the Central Plains, 600,000 to 700,000 soldiers were stationed for many years. .

The military threat of Goguryeo made the Central Plains dynasty like a needle. Starting from Emperor Sui Yang, in order to solve the threat of Goguryeo, the three campaigns made Goguryeo vigorous and vigorous. It also indirectly led to the demise of the Sui Dynasty. If there were no conquests by Emperor Yang of the Sui Dynasty, then in the disputed years of the late Sui and the early Tang, Goguryeo would surely invade the Central Plains in a large scale.

During Taizong of Tang Dynasty, Goguryeo not only united with the Baiji alliance, but also with the Turks. At the same time, they also had a strong control over the Khitan and other ethnic groups. One purpose: to fight against the Central Plains Dynasty. However, this series of operations by Goguryeo is undoubtedly stimulating the nerves of the emperor of the Tang Dynasty. How can people be allowed in the couch? In order to completely resolve the threat of Goguryeo, the Tang Dynasty launched a powerful military attack on Goguryeo. This military attack lasted for hundreds of years. Almost the entire Tang Dynasty’s foreign wars were inseparable from Koguryo. In the 6th year of Yonghui, the power of Goguryeo became weaker and weaker, and domestic rule appeared turbulent. Regimes all over the country supported themselves by supporting themselves, coupled with the military strikes of the Tang Dynasty, and finally fell.

After the demise of Goguryeo, the Tang Dynasty also began to go downhill, unable to maintain a strong military force. Therefore, a new force appeared in the area ruled by Goguryeo, that is, Khitan. Later, Northeast Asia started a new round of power alternation.