Obviously, it was the Song Dynasty that united Jin to destroy Liao , why was it the Song Dynasty th

Because the purpose of the Jin State is not just to destroy Liao, and only the Song Dynasty did not understand this, how big the ambition of the Jin State was, the Song Dynasty originally thought that it could use this to recover the frontier, but it did not expect that the praying mantis caught the cicada, and the yellow finch was behind, but it was destroyed by the Jin State.

This is called throwing bricks and attracting jade, stupid Song Dynasty, I didn't expect Jin's ambition to be so big, Liao State is an important protective barrier of the Great Song Dynasty, the Song Dynasty wants to recover the frontier, but I don't want to be Huang Que behind, the Song Dynasty is called harming others and harming themselves.

Because what they want to eliminate is also the Song Dynasty, and joining forces is just a means, the praying mantis catches cicadas, and the yellow finch follows.

Jin's purpose was to occupy the Song Dynasty after the destruction of Liao, so when the Liao barrier disappeared, they began to invade the Song Dynasty unscrupulously.

Because Song didn't realize that Liao was actually a barrier for Song, and once this barrier was damaged, Song would be finished.

In my opinion, this strategy is not wrong, because according to the general environment at that time, in the context of the big times, they only have this path to choose.

The sweetness and sourness of the result are due to the fact that the emphasis on literature and light on military force is the result of Xiucai meeting soldiers, being unreasonable, and not even connecting is the result of perdition!

Very simply, we can sum it up in eight words: "The lips are dead and the teeth are cold, and we can't measure ourselves." This decision of the Northern Song Dynasty is actually self-defeating!

The plan of "Lianjin to destroy Liao" refers to the agreement with Jin to destroy Liao in the last years of the Northern Song Dynasty. Originally, there was the Liao State separated between the Jin State and the Northern Song Dynasty, and the three parties basically formed a stable and peaceful situation. However, after the implementation of this covenant, the Liao state was destroyed, and the Jin state and the Northern Song Dynasty changed from sea connection to land direct border.

Two years later, the Northern Song Dynasty was also destroyed by the Jin State. So, why did the Northern Song Dynasty court have such a plan as "Lianjin to destroy Liao"? The answer is simple, because of the sixteen states of Yanyun.

During the Five Dynasties and Ten Kingdoms period, Emperor Shi Jingjiao of the Later Jin Dynasty gave the sixteen states of Yanyun to the Liao State. Since then, the Central Plains Dynasty has lost its natural barrier against the invasion of the northern nomads, and at the same time, the Sixteen Prefectures of Yanyun also represent the dignity of the Central Plains Dynasty, so recovering the lost land has become the dream of the later Central Plains emperors.

By the end of the Northern Song Dynasty and the decline of the Liao State, the plan of Zhao Lianghei of Song Huizong managed to make a detour to the Bohai Sea and get in touch with the Jin State. And in 1120, the "Maritime Alliance" was signed, stipulating that the Northern Song Dynasty and the Jin State would jointly attack the Liao State, and the Yanyun region would be returned to the Northern Song Dynasty after the Liao was destroyed, and the Northern Song Dynasty would pay tribute to the Jin State.

Unexpectedly, in the Lianjin annihilation of Liao, the Jin State swept through the Liao State with strong military strength, and captured half of the territory of the Liao State, including its capital Shangjing, in less than 5 years. However, the more than 200,000 forbidden troops led by Tong Guan in the Northern Song Dynasty were defeated in front of the remnants of the Liao State and almost all the troops were wiped out. In the end, it was the Jin army that came forward and reluctantly recovered the six empty cities.

The strength of the army between the Jin State and the Northern Song Dynasty can be seen.

Of course, here, we also have to correct Zhao Liangsi's name. On the surface, it was indeed Zhao Liangsi's proposal of "Lian Song to destroy Liao", which led to the final demise of the Northern Song Dynasty, but let's imagine what would the outcome of the Northern Song Dynasty be if there was no "Lianjin to destroy Liao"? According to the ambition of the Jin State at that time, it was nothing more than the Jin State alone to eliminate the Liao State, and finally test the Northern Song Dynasty, and finally destroy the Northern Song Dynasty.

Lianjin's plan to destroy Liao" just accelerated the end of the fall of the Northern Song Dynasty.

The fundamental reason for the demise of the Northern Song Dynasty was because of the emphasis on literature and light on military force. Zhao Kuangyin, the founding emperor of the Northern Song Dynasty, because he was a military general, was born in the Chenqiao Mutiny and the yellow robe, so the Northern Song Dynasty implemented the policy of "emphasizing literature and light on military force", which effectively prevented the generals from supporting the army and consolidating the centralization of power, but it also led to a fatal blow to the enthusiasm of the military attaché and seriously weakened the army's combat effectiveness and national defense strength.

In addition, since the beginning of the "Lanyuan Alliance", the Northern Song Dynasty paid tribute to Liao every year, and the Song Dynasty and the Liao State began friendly exchanges, and there were no large-scale wars in the past hundred years, maintaining a basic peace situation. At the same time, the armaments of the Northern Song Dynasty were slackened, and the combat effectiveness of the forbidden army gradually declined.

Because of these two points, Tong Guan's army of 200,000 was easily defeated by the remnants of the Liao people. And it is precisely because of this result that the Jin people feel that the Northern Song Dynasty is like a lamb to the slaughter, and finally in 1125 AD, the Jin State did not hesitate to tear up the peace treaty and attack the Northern Song Dynasty in a big way. In the engagement, the Great Song Dynasty collapsed at the first touch, and in less than two years, the Northern Song Dynasty perished.

Because the strength of the Northern Song Dynasty itself was not as strong as Jin, after destroying the Liao State with Jin, the Jin State was a monopoly and had no constraints, as the so-called lips and teeth were cold, and the Song Dynasty, which had a weak army, was not the opponent of the Jin State after swallowing the Liao State, so it was finally breached and the capital was forced to move south.

Since the founding of the Northern Song Dynasty, the biggest historical failure was the destruction of Liao by Lianjin, which finally led to the demise of the Northern Song Dynasty. The agreement of the "Maritime Alliance" of the Jin Dynasty to destroy the Liao was the so-called alliance signed with the Jin State in the last years of the Northern Song Dynasty, and it was this whimsical covenant that finally led to the faster demise of the Northern Song Dynasty.

Because the incompetence of the Song army was exposed on the battlefield of the Liao annihilation, the commanders of the Jin State looked down on the Song State very much and directly attacked the Song State.

Lianjin exterminated Liao" can only say that the medicine is a good medicine, but instead of curing the disease, he died! Such an outcome is because he did not recognize the strength of his own country and the strength of the Jin country. If the Song Dynasty did not renegade on the covenant but supported the Jurchens, perhaps they could defend themselves from the enemy outside the country without using swords, although it was humiliating, but it could exist.

The two Song Dynasty died in the lip and died in the cold, and the north du

In fact, the Liao State and the Jin Monopoly Kingdom were conquered by the broad and profound Han culture of the Song Dynasty in the later period, and they have been sinicized, but despite this, the psychology of the Song Dynasty has been in a state of unease for a long time, so when another force began to rise, the Song Dynasty did not realize who was the real danger, and wanted to take the opportunity to eliminate the uneasy factors in front of them.

The mentality of the Song Dynasty is basically like this, I eliminate the current hidden danger is the actual benefit, and whether the other force will rise or not is still uncertain, even if the probability of rising because the two sides have comradeship to become an enemy is very small, this is a plan that can be drawn. Who knew that two consecutive wishful thinking calculations were wrong, which led to the accelerated rise of Jin and Meng, which directly caused the demise of the two Song Dynasty.

A Liao country that knows its roots, and it has been sinicized and not united. The Jin State can defeat the Liao State so many times, and he doesn't know the gap in the strength comparison, and the Song State is the worst. After the Jin State destroyed the Liao, he could directly attack the Song State.

In the fifth year of Zhenghe (1115), Wanyan (Aguta), the leader of the Jurchen nobility under the rule of the Liao Dynasty, established a slave-owning state on the side of the Tongtong River (now the Songhua River and Heilongjiang River east of the Tongjiang River), and the country was called Jin. Then he attacked the Liao Dynasty and repeatedly defeated the Liao soldiers. Song Huizong and others thought that the Liao Dynasty was bound to fall, and decided to join Jin to destroy Liao and take the opportunity to restore Yanyun.

In the second year of Yihe (1120), the Song and Jin Dynasty were established"Maritime Covenant": After the two sides attacked the Liao Dynasty, the Jin army captured Liao's Zhongjing Dadingfu (now Ningcheng, Inner Mongolia), and the Song army captured Liao's Nanjing Xijin Mansion (now Beijing) and Xijing Datong Mansion (now Datong, Shanxi) to destroy Liao, and the land of Yanyun returned to the Song, and the Song transferred the New Year's coins originally sent to Liao to the Jin Dynasty. In the fourth year of Xuanhe, the Jin army captured Liaozhongjing and Xijing, and the Song army led by Tong Guan and Cai You attacked Liaonanjing twice in succession, but was defeated by the Liao army.

Tong Guan asked the Jin army to attack Nanjing. In December, the Jin army marched from Juyong Pass and captured Nanjing, Liao. The Jin Dynasty proposed that Yanjing (Liaonan) be returned to the Song Dynasty, and the Song Dynasty gave Yanjing a tax of 1 million guan to the Jin Dynasty.

Song Huizong and Wang Hao all agreed to do so. The Jin army plundered all the property, men and women in Yanjing City, and the Song Dynasty only received a dilapidated empty city and changed Yanjing to Yanshan Mansion.