Faced with this situation of attacking from the north to the south, the officials of the provincial court of the Jin Dynasty played a concert, advocating sticking to various cities and clearing the wilderness, so that the Mongol army could not attack and could not fight.

Jin Aizong thought that this kind of passive defensive policy was tantamount to waiting for the other side to break through and sit back and wait for death, so he reluctantly adopted the policy of desperate and decisive battle with the Mongol army, and ordered Wanyan Heda and Pua to lead the main force of the 150,000 Jin army, stationed troops in Yuxiang and Deng, and fought a decisive battle with the Mongolian army's troops dragging mines.

Faced with the situation of being outnumbered by the enemy, Tuo Lei first took the initiative to retreat, concealed his military strength, and then used the method of mobile warfare to disperse and dip north, successively breaking through the places of Miyang, Nanyang, Fangcheng, Xiangcheng and other places north of Dengzhou, until the counties in the south of Kaifeng Prefecture, preparing to take advantage of the situation to attack Bianjing.

In order to defend the capital, Wanyan Heda and Pua had to lead an army of 150,000 soldiers from Dengzhou to follow the Mongol army and then march to Kaifeng Mansion. After Tuo Lei followed the palace with 3,000 troops, he followed behind the Jin army with 3,000 troops, forcing the Jin army to march and fight, and there was no food or rest.

There was a battle of Sanfeng Mountain between the two sides, and no one in the Jin army escaped, most of the generals had died, and only Wanyan Wuxian fled. In March of this year, Wokotai and Tuolei withdrew their troops to the north, and Liusubutai besieged Bianjing, and ordered King Tasi and the general Kuduhu to command troops to pacify Henan Prefecture.

Attacking Bianjing, the Song Dynasty destroyed Jin Subutai to attack and surround Bianjing, and first sent an envoy to surrender. Jin Aizong sent King Cao as a hostage and sent a peace envoy, but there was no result. Subutai ordered the Mongol army to attack the city, ordered the captives and women to fill the moat with firewood and grass, built a siege of 150 miles outside the city of Kaifeng, there were battlements and towers in the city, and there were trenches about one zhang deep and wide, about thirty or forty steps to set up a soldier shop, each laying more than 100 people to defend, surrounded Bianjing with a flood.

Then first use stone cannons to attack the city, each corner of the city set more than 100 cannons, day and night continuous bombardment, the defenders of the city used the most advanced firearms at that time, thunder, flying muskets, to the Mongol army to inflict great damage. Subutai sieged the city for 16 days and nights, and the number of dead inside and outside was calculated in the tens of thousands.

When Subutai knew that it would not be so easy to capture, he spoke kindly to the Jin State, saying that the two countries had already made peace, so why should they attack each other? The Mongol army retreated to Heluo and made a strategic encirclement of Kaifeng Province. At this time, there was a large influx of refugees from the Jin Kingdom, and the population of Kaifeng Province increased to more than two million at once. In May of that year, there was a great plague, and more than 900,000 people died of disease in 50 days, and countless people were too poor to be buried.

In July of this year, Wokotai sent more than 30 people, including the envoy Tang Qing, to Bianjing to surrender, but they were killed by the soldiers of the Jin army, and the two sides broke off the peace relationship. The warehouses in Kaifeng City were scarce, the food was gradually exhausted, and there was a tragic situation of cannibalism. Jin General Wanyan Silie, Wu Xian and others led the army to rescue, but they were defeated by Subutai. When Jin Aizong ran out of food, he decided to give up Kaifeng Mansion and go out to join the army. When he set out from Bianjing, there were still 30,000 soldiers and soldiers in his army.

Jin Aizong crossed the Yellow River, attacked Weizhou and was defeated, and only six or seven people were left to flee to Guide. When Subutai heard that Jin Aizong had fled, he immediately led his troops to surround Bianjing and sent an army to pursue Aizong. Cui Li, the marshal of the western part of the Jin Kingdom, staged a coup d'état, killed the two ministers who had time to escape in the future, and sent people to ask for surrender from Subutai.

Subutai entered Bianjing City, stationed in Qingcheng outside the south gate of the palace, and sent an urgent envoy to the Mongol Khan's court to demand the slaughter of the city, which was later stopped by Yelu Chucai. In April, according to the order of the Yan clan to stop the crime of Wokotai, Subutai executed more than 500 men and women of the Liang king, Jing Wang and the clans, and sent the queen mother and the queen to the Mongolian steppe.

Wokotai sent Wang Ji to the Southern Song Dynasty to discuss the matter of joining forces to destroy Jin, and the two sides agreed to return to the Song Dynasty with Henan after destroying Jin. In April of the following year, the Southern Song Dynasty sent Meng Hui to lead an army to attack Tang and Deng in accordance with the covenant, defeating the Wuxian army, Jin Aizong fled to Caizhou, and sent envoys to make peace with the Song, but the Southern Song Dynasty rejected the Jin Dynasty's request. In August, due to the deep fortification of Caizhou City, the Mongol army could not attack for a long time, and sent Wang Ji to the Southern Song Dynasty, asking the Song Dynasty to send troops to transport grain to support.

The Song general Meng Heng led an army of 20,000 soldiers and transported 300,000 stones of grain to support the Mongol army, and the Song and Mongolian armies jointly launched a fierce attack on Caizhou. The Mongol and Song coalition troops poured into the city, and Jin Aizong hanged himself in Youlan Pavilion, and the Jin Dynasty perished.

Genghis Khan had four sons-in-law, the eldest son Jochi, the second son Chagatai, the third son Wokotai, and the fourth son Tulei. Genghis Khan's favorite is the fourth son Tuolei, and the least favorite is the eldest son Jochi, and Jochi has died of illness before, first by Tuolei for two years, but Tuolei is not the legitimate heir, and later by Ogedai officially inherited the Khan's throne, known as Yuan Taizong in history.

That is, in the fourth year after Ögedei succeeded to the throne of Khan, Tuo Lei suddenly died violently in the army, how did he die? Some people say that Tuo Lei was killed by his third brother Ogedei, some say that he was deceived by a sorcerer and died, and some people say that he really died of a violent illness. Which statement is true is still a matter of doubt.

Lichu, for the feudal dynasty, is to choose the emperor's successor, this matter is related to the major affairs of the country, and has always been the most sensitive issue in the feudal dynasty. In all dynasties, in order to compete for the right to inherit the throne, how many swords and swords, life-and-death battles have been staged, and how many people have become victims of the struggle for imperial power. In those countless battles, the most precious family affection in the world was covered by terrible longings, slashed without a trace by bloody butcher knives, and the human soul was completely distorted. Many emperors in the feudal era climbed to that throne by stepping on the bones of their relatives.

Genghis Khan, who was a generation of pride, made serious mistakes in choosing his successor. According to the principles of the feudal patriarchal system, the primogeniture system was usually implemented, that is, the eldest son Jochi should be the legal heir of Genghis Khan. But Genghis Khan did not do this, but chose his third son, Ogedei, as his successor.

Genghis Khan did not like his eldest son, Jochi, because he suspected that Jochi was not his own son. Genghis Khan's first wife was called Polti, and Jochi, Chagatai, Ogedai, and Tuolei were all born of Balti. Soon after Genghis Khan and Polti got married, they were suddenly attacked by the Mur beggars, who returned the favor and kidnapped Genghis Khan's wife.

Later, Genghis Khan, with the help of two other tribes, defeated the Mir beggars, rescued the Erti, and soon gave birth to Jochi. However, Genghis Khan doubted whether Jochi was his own flesh and blood, so that it became a shadow in his heart that could never be erased, which also became an important reason why he did not like Jochi.

So was Jochi Genghis Khan's own son? Lother was pregnant before she was taken captive by the Mir Beggars, and gave birth to Jochi on the way to Genghis Khan's rescue. It is clear that Jochi is Genghis Khan's biological son, and this will not be a problem, but at that time when scientific knowledge was very lacking, Genghis Khan became suspicious of his own son.

Chagatai was the second oldest of Genghis Khan's sons-in-law, and his character was very different from that of his brother Jochi. Jochi is a very kind person, and his personality is more introverted, and he doesn't like to be public. Because of personality and other reasons, the two brothers have been at odds since they grew up, and everyone has doubts about Jochi's birth, so Chagatai has always looked down on his eldest brother Jochi, and resolutely opposed Jochi as the heir to the throne.

Genghis Khan led a large army to the west to conquer the kingdom of Khorezm, and before the expedition, another empress of Genghis Khan reminded Genghis Khan that he should consider the issue of establishing a prince. Genghis Khan was unsure of his successor, on the one hand, because he had no time to take care of the successive wars, and on the other hand, he was afraid that he was still not very satisfied with Jochi, so he had been hesitant. After being reminded by the empress, Genghis Khan felt that it was time to consider this issue, so he summoned all four of his sons to his big tent to discuss the establishment of a prince.

Genghis Khan first asked Jochi's opinion, Jochi was the boss, let the boss speak first, but Jochi was very depressed at this time. Traditionally, old nature is the rightful heir, so why bother? Just as he was about to speak, Chagatai spoke first, and Chagatai unceremoniously said to Genghis Khan: "If you were to choose the son of the scornful beggar to be your heir, we would never be willing to be subordinate to him." ”

As the saying goes, hitting someone doesn't slap you in the face, and exposing people doesn't expose your shortcomings. However, Chagatai never spoke mercilessly, and when he opened his mouth, he spoke with insulting words, and the spearhead was directly aimed at Jochi's sore spot. Jochi's self-esteem was greatly hurt, and he quarreled with Chagatai in person, and finally drew his sword to fight.

Genghis Khan drank his two sons, scolded Chagatai, and claimed that Jochi was his own son, so that Chagatai should not be presumptuous. Although Chagatai's arrogance was suppressed, he still resolutely disagreed with Jochi as the legitimate heir to the throne, and recommended his third brother Ogedei.

What was Chagatai's real intention? The reason why Chagatai vigorously opposed Jochi's succession to the throne did not rule out that he had the ambition to covet the throne. Why? Because he is the second of the four sons-in-law, if the eldest is brought down, won't it be the second child's turn next? This is a very natural thing. But on this occasion, Chagatai didn't dare to blatantly reveal his heart, so he hypocritically recommended his third brother Wokotai.

In fact, Genghis Khan has long analyzed his four sons, although the eldest son Jochi is kind and kind, but he lacks a resolute and resolute character, and it is difficult to achieve great things. Although the second son Chagatai is resolute and brave, he lacks the bearing of humility and is difficult to rule the world. Sanziwo Kotai is enthusiastic and bold, flexible and wise, and very urban, and it seems that he can't find any shortcomings. Although the fourth son of Tuo Lei is shrewd, it is a pity that he is too young to convince the public, and it seems that only the third son is a more suitable candidate.

Genghis Khan saw that Chagatai strongly recommended Ogedai, so he asked Jochi and Tulei for their opinions. Although Jochi was reluctant in his heart, he knew in his heart that his father didn't like him and had no intention of letting him succeed him, so he had to reluctantly nod. The fourth Tuo Lei knew that he had three elder brothers above him, and he couldn't take his turn, so he agreed.

The problem of Lichu was solved in this way, of course, Chagatai at this time was really dumb and ate Coptis chinensis, and he couldn't say that he was bitter.

According to the Mongol tradition, before Ögedei succeeded to the throne, he had to convene a Kuritai assembly attended by the kings and chiefs of various tribes, and only after the approval of this council could he inherit the throne. Genghis Khan also recommended a think tank figure to Ogedei, and this person was the famous Yelu Chucai.

The Kuritai Conference was to be convened immediately, but there were many obstacles and difficulties. On the one hand, although the Western Xia Kingdom had just been destroyed, the Jin Kingdom and the Southern Song Dynasty still existed, and the task was still very arduous. On the other hand, after Jochi's death, his son Batu became the heir, and Batu was angry that his father Jochi was not able to become the heir to the throne, so he found various reasons not to attend the Curitai conference.

Genghis Khan's second son, Chagatai, in order to oppose Jochi, strongly recommended Ogedei as the heir to the Khan throne, but he didn't expect it to be self-defeating, and he made a bamboo basket to draw water for nothing, and he didn't catch anything. He was unwilling to be occupied by his third brother Wokotai, so he was unwilling to convene this conference.

If the Kuritai Conference could not be held, Ogedai could not inherit the throne of the Khan, so he could only be temporarily supervised by his youngest son. The so-called supervising the state is to act as the agent of the state and exercise power on behalf of the Great Khan, give orders, and command all affairs of the state.

This person is known for his courage to attack and advocate martial arts. Because he was the youngest among his sons-in-law, Genghis Khan liked him very much, so he has always been by Genghis Khan's side, followed Genghis Khan in the southern and northern wars, and made many military exploits. As was customary for the Mongols, Tuolei received all of Genghis Khan's possessions, as well as most of his army, and he was the most powerful.

It has been almost two years since Tuolei was imprisoned, and according to Genghis Khan's will, the Great Khan should be passed to Ogedei, but at this time, Tuolei showed no signs of transferring power. The position of Khan has been vacant, which is very unfavorable to the country, which can be very bad for one person, and this person is Yelu Chucai.

Yelu Chucai is a great figure, he was originally a descendant of the Liao royal family, that is, the eighth grandson of Dongdan Wang Tuyu, the eldest son of Liao Taizu Yelu Abaoji. However, when he was born, the Liao State had been destroyed by the Jin State, he lost his father at the age of three, and relied on his mother's education to become a well-known erudite and talented man, and later came to Yanjing, the central capital of the Jin State.

After the Mongol army captured Yanjing, Yelu Chucai devoted himself to studying Buddhism, forming the ideological principle of governing the country with Confucianism and governing the heart with Buddhism, and determined to contribute to the country with what he had learned in his life.

When Genghis Khan heard that Yelu Chucai was a rare talent, he recruited him to his side and became Genghis Khan's most important think tank. Yelu Chucai is resourceful, like Zhuge Liang in the Three Kingdoms period, he knows astronomy and geography, strategizes, and wins thousands of miles. He followed Genghis Khan to the west to conquer the country of Khorezm and conquer Western Xia, and repeatedly made strange plans, and was called a god by Genghis Khan many times.

Wokotai was a person with a deep city government, so he took a fancy to Yelu Chucai as a pillar of governing the country, and secretly decided that once he grasped the power, he must reuse this person. Wokotai took Yelu Chucai with him, and when he encountered major and minor affairs, he always had to seek Yelu Chucai's opinion. Yelu Chucai saw that Ogedai respected himself very much, and his heart was very moved, so he decided to do his best to promote Ogedai to inherit the throne of the Great Khan as soon as possible.