There are many reasons why the Tang Dynasty destroyed Goguryeo, and the reasons still started from the Sui Dynasty.

In 581 AD, Emperor Wen of Sui Yang Jian usurped Zhou and established Sui Dynasty. Soon after, he defeated the Turks in the north and pacified the Chen Kingdom in the south, thus ending the war and division that lasted for hundreds of years in the Central Plains.

The unification of the Sui Dynasty made Goryeo, which was in danger of being in the civil strife of the Central Plains, annexing Liaodong and separating the country, and was in panic all day long.

When King Goryeo was informed of the Sui Pingchen news, he was "very afraid of governing the army and storing grain," but Emperor Wen of Sui had no intention of expedition in the east at this time.

Unexpectedly, the King of Goryeo Gao Yuan led tens of thousands of troops to plunder the western Liaoning, and was defeated by Wei Chong, the general manager of Yingzhou. Emperor Wen was furious when he heard the news, and then he started the three campaigns of Goryeo.

By the Tang Dynasty, Goguryeo, before the war with the Tang Dynasty, had become more and more stable after the Sui Dynasty conquest.

Although the national strength cannot be compared with the Tang Dynasty, the population of Goguryeo and its economic and cultural development were far greater than the later regimes in the Northeast.

It integrates the Northeast region and the Korean Peninsula, and has a powerful and brave army with a complete range of troops, excellent equipment, advanced military theory and tactical ideas, and complete defense methods.

If Goguryeo is allowed to continue to develop, as long as it unifies the three kingdoms of Korea and is based in the Northeast, once the Central Plains fall into turmoil, Goguryeo can take the opportunity to invade the south, and the consequences will be unimaginable.

Moreover, during the Tang Dynasty, the four barbarians were powerful and the surrounding friends and neighbors were all followed by the leader of the Tang Dynasty. They almost came to offer sacrifices every year and came to pay tribute every year.

Among them, Silla was the younger brother of the Tang Dynasty. Under the leadership of Yoon Gaisuwen, Goguryeo's desire to expand externally was extremely expanding, and supported Baekje and openly attacked Silla, which meant to go against the Tang Dynasty.

In the 17th year of Zhenguan, Silla sent envoys to the court, telling the story of Baekje's capture of more than 40 cities of Silla, and joined forces with Goguryeo, intending to cut off Silla's path to the dynasty, begging the Tang Dynasty to send troops to rescue Silla.

Emperor Taizong of Tang immediately sent the prime minister of the Sennong, Li Xuanzhuo, to bring an edict to Goguryeo and order Goguryeo and Baekje to stop military operations, otherwise the Tang Dynasty would attack them.

Goguryeo refused to follow, not only did he join forces with Baekje to attack Silla, but he also sent envoys to the north of Mo to instigate the relationship between Xueyantuo Khanate and the Tang Dynasty, and he had the potential to compete with the Tang Dynasty!

The Tang Dynasty could not tolerate such behaviors that challenged authority. Later, Emperor Taizong of Tang decided to use military force against Goguryeo, which was actually the most direct reason for the Tang Dynasty to destroy Goguryeo.

Another thing is that during the Sui Dynasty, he launched four major expeditions to Goguryeo, once and three times, all ended in failure.

In these wars, in addition to many Sui soldiers who died in battle, many soldiers were captured or scattered in Goryeo.

In the early years of Wude, Emperor Gaozu of Tang Dynasty exchanged prisoners of war with Goguryeo and obtained more than 10,000 Han people, which shows how many Han people were stranded in Goryeo at the end of the Sui Dynasty.

In the fifteenth year of Zhenguan of Emperor Taizong of Tang, Emperor Taizong of Tang sent Chen Dade, the doctor of Fang, to a mission to Goryeo. On the way, he met a large number of Han people and was surrounded by a road.

The Han people were in a very unoptimistic situation, and they had no fixed residence, and were oppressed and persecuted by the officials and citizens of Goguryeo.

After Chen Dade returned to the Tang Dynasty, he reported what he saw to Emperor Taizong of Tang. Emperor Taizong was furious and said, "Goryeo is the four counties, and I sent tens of thousands of soldiers to attack Liaodong. He would save him from all over the country. He would send his boat troops out of Donglai and go to Pyongyang from the sea route. It would be difficult to obtain it."

From the words, we can see that in order to save the Han people stranded in Goryeo, Taizong had already intended to conquer Goryeo.

Finally, Goguryeo built the Great Wall and joined forces with the Turks.

During the Sui Dynasty, after the "Four Sui Gao Wars" of the Sui army, the Goguryeo people piled up the corpses of the fallen soldiers of the Sui army, forming a creepy "landscape" for the people of their country to watch, and also meant to humiliate and provoke the Tang Dynasty.

Shortly after Emperor Taizong of Tang ascended the throne, he learned about this from his envoys and was filled with righteous indignation. In the fifth year of Zhenguan, people sent people to send the bones of the fallen soldiers in the "Gao War of Sui". At the same time, the bones of the fallen soldiers in the Sui Dynasty were retrieved to return to the Tang Dynasty to pay tribute.

Unexpectedly, the retrieval of the remains of the soldiers of the Sui Dynasty caused great fear among the Goguryeo people. Goguryeo then only asked the Tang envoy to take back a few remains.

He also spent a lot of artificial resources to build the Great Wall of Goryeo along the Tang Dynasty border and establish an alliance with the Turks. His intention to occupy Liaodong and anti-Tang Dynasty was obvious.

Although Emperor Taizong of Tang wanted to send troops to attack Goguryeo immediately, considering that after years of war in the early Tang Dynasty, the country needed a period of rest and recuperation, he did not take action for a long time.

So no matter from any aspect, Goryeo is capricious at this time. If Guo Hao planned the Northeast region, how could he allow Goryeo to interfere? If he didn't do it well, he would even make wedding dresses for others.

So if you want to regain Northeast China, you must deal with Goryeo. Even if you do not destroy them, you cannot let them make trouble behind the scenes!

Back then, Goryeo plundered many Han people and later took in many Jurchens. Guo Hao planned to return these populations to fill the gaps in the Northeast!

"Transfer my will to enthrone Wanyan Ji as the King of Jurchens, and his fiefdoms were all prefectures and counties in northeastern Liao, and his common ruler of the Jurchens and a vassal state of the Song Dynasty!

At the same time, let the Ministry of Foreign Affairs send envoys to Goryeo with the letter of state, and ask for Han and Jurchen people. If they don’t give it, they will send a navy to fight and point directly to Kaijing!”

Zhao Kuangyin didn't want the two sides to start a war, but Guo Hao was not thinking about this.

At this time, he had the most powerful navy in the world, and the capital of Goryeo Kaijing happened to be on the beach, which provided him with convenience.

If Goryeo does not agree to return the Han people, Guo Hao will send Goryeo a thousand cannons together. As for whether the war will really start, it depends on Goryeo's reaction.

Guo Hao's moves so much in Liaodong, so naturally, the Song Dynasty would not have known that many ministers felt that it was not worth doing this. The world was just a few years old, and Guo Hao had such a big fight.

The civil officials did not understand, but the military generals were very excited because most of them had fought with the Khitan. Guo Hao planned Liaodong, obviously to deal with the Khitan.

However, Guo Hao took too much steps and the domestic power supply was a bit insufficient, but at this point, Guo Hao could only persist.

Due to the lack of food, conflicts have already occurred within the Wanyan tribe. This is a good start. As long as the Jurchens are unified, Guo Hao can breathe a sigh of relief.

"Your Majesty, there are different voices in Wanyan's tribe. Can we start to surrender?

The two generals Liu Shouzhong and Feng Jiye have arrived, and the 80,000 army has already been in place. Together with General Cao’s 20,000 naval forces, a total of 100,000 army!”

Another one hundred thousand. If it weren't for the support of new crops, Guo Hao would not have been able to support so many troops. Now there are 400,000 regular troops in the Song Dynasty!

With so many troops, the annual food and salary are astronomical. It’s not that the country cannot afford it, but Guo Hao has to do too much and needs money in all aspects.

"It's almost the same in Liaodong. Next, let's look at Goryeo's reaction. I hope they can be more sensible and don't waste my shells!"

In the Goryeo Kingdom, the envoy followed Cao Bin's Navy to the coast of Kaijing. After meeting the king Wang Zhao, he presented the letter to the Great Song Dynasty.

Wang Zhao looked at Guo's writing and showed horror. In fact, the internal news of Goryeo was very chaotic, and there were constant open and secret struggles.

History says: "From the 16th year of Gengshen to Yihai, evil spirits competed for the slander and great prosperity. A gentleman had no place to go, and a villain got his ambition, so he turned his son against his parents.

When the slave discusses his master, he is disconnected from his superiors and subordinates, his ruler and his subjects disintegrate, his old ministers and generals will be punished by each other, and their relatives will be destroyed."

The heroic minister Park Shouqing died of anger because his third son was imprisoned, and Cui Zhimeng was exiled by Wang Zhao casually making excuses.

Within the royal family, Wang Zhao's half-brother Wang Yuan and Prince Xiaoyin were sentenced to death for suspected rebellion. Huizong and Dingzong's only son were killed by Wang Zhao. Even Wang Zhao's only son Wang Yichang was suspicious and was in danger of danger.

He also founded Guifa Temple in July of the fourth year of Junfeng, and held many Dharma meetings and vegetarian meetings. He was enthusiastic about Buddhist affairs and won over all the monks and masters such as Tan Wen, trying to use Buddhist forces to win the hearts of the people and fight against the rich.

In such a chaotic situation, the Song Dynasty got involved again, and Guo Hao was a coincidence. He didn't understand the situation before and misunderstood Goryeo.

Wang Zhao knew in his heart that if he had such internal and external troubles, if the Song Dynasty sent troops to conquer, he would lose his throne and even lose his life if he was not careful.

After receiving the envoy respectfully, Wang Zhao sent someone to observe at sea. Twenty warships were indeed parked there, and it was very scary to see the scale.

After learning about Guo Hao's actions in Liaodong, Wang Zhao knew Guo Hao's purpose. Although he was a little reluctant, he could only agree to maintain his position.
Chapter completed!