Möngke Khan was one of the best heirs of Genghis Khan's many descendants, one of the most outstanding Mongol Great Khans, who pushed the cause of the Mongol Empire to the top, and the death of Möngke Khan led to the fragmentation of the Mongol Empire, which also created the conditions for Kublai Khan to ascend the stage of history.

Because of the strong military strength of the Tractor Mine Department, the descendants of the Tractor Mine Department with many talents were able to divide the world. The second brother, Kublai Khan, unified China and established the great Yuan Dynasty, and the third brother, Hulegu, established the huge Ilkhanate.

Batu, the second son of Genghis Khan's eldest son Jochi, because of the strong strength of the Ulus of Jochi, he supported Möngke Khan and became the most powerful king of the Mongol Empire.

After the death of Guiyu Khan, the contradictions within the Mongol gold family tended to become public. Batu decided to let Guiyu's wife, Sulli Haimishi, govern the government together with the ministers, and since Zhenhae had always been the prime minister's priority, he could continue to serve until the new khan succeeded him, and Sulli Haimishi began to become regent with the support of Batu.

During the reign of the Sulli, there was nothing to do but trade with merchants. Her two sons, Quecha and Brain, set up a mansion in the same place and fought against their mother, resulting in the emergence of three rulers. On the other hand, the kings issued documents and decrees without authorization, and due to disputes within the imperial court, the khanate fell into chaos. In that year, there was a great drought, the water springs dried up, the weeds burned themselves, the cattle and horses died, and the people were struggling to survive.

Faced with this situation, Batu decided to convene a Kurultai conference in Arahumahei to discuss the election of a new khan. In accordance with the decree of Batu, the prince and the Nayan convened a general meeting in Arahumahei, and decided to convene the Kurultai in Kudi Arael in April of the following year, which was opposed by the Wuli Haimi Shi and Kucha and Naoku.

Batu summoned the Jochi family, Möngke, Mogo, and Harahule, and signed an agreement to support Möngke as Great Khan, and asked his brother Beerge to lead an army to escort Möngke to Daurdo, preparing to formally convene a general meeting in Kudiearal to support Möngke as Khan. However, the resolution of this congress was opposed by the Ögedai and Chagatai clans, believing that the great power could not be left behind, and refused to participate in the Kudiearal conference, so that the participation of all the kings of the Kulilatai was postponed for another year.

In order to convene the Kudiearal Assembly as soon as possible, Batu sent envoys to various places to persuade them, but they were all refused. Batu ordered the convening of the meeting in Kudie-Arail, which was attended by the right-wing princes of Kuriltai, Berge, Harahule, Hedan, and Möngkedu, and the sons of the left-wing princes, such as the sons of the left-wing princes, such as the sons of the left-wing princes, and Kublai Khan's Hulegü Alibuge.

At the conference, as the representative of the Wuli Haimi History, he put forward the idea that he could reign over the world. Busy Gezar and others sided with Batu and put forward the reason for the establishment of Möngke, the son of Torre, as Khan, and after some fierce debate, it was finally decided to support Möngke as the Great Khan. During the convening of Kurultai, the Martyrs Gate colluded with the kings of the Wokotai clan in an attempt to seize the throne of Khan, but the matter was unsuccessful because of the leakage.

One of the first major events of Möngke Khan's accession to the throne was to eliminate dissidents and consolidate his rule, and many of his former ministers were executed. In order to prevent the joint rebellion of Chagatai and Ogedai Ulus, he used 100,000 troops to garrison between Beshbali and Hara and Lin, and 20,000 troops to garrison in the areas of Jili Jisi and Qianqian Prefecture. After the military deployment, he sent envoys to Haiabili and Ye Mili to gather Kucha and others in Hara and Lin.

According to the instructions of Möngke Khan, he sent the Lost Liemen to Tan Ma Chi and conquered the Han land, sent the two kings of Kucha and Naokhu to the land of Hara and Linxi to be detained in the land of the Luohan River, put Zhenhai and Hada to death, and threw the Wuli Hai Mishi into the river and drowned. Möngke Khan killed almost all the opposition in the clan and the former ministers of the court, and sent envoys to Hezhong and the Central Plains to track down the Ögedai faction, and ordered the arrest of Guiyou's commander in Persia, Erle and Nayan, and handed him over to Batu to be executed.

After Möngke Khan eliminated his political enemies, he divided the fiefdom of Ögedai into several pieces and distributed them to the descendants of Ögedai. Hedan is divided into eight miles, and the Shihe area where the Lili is divided is also divided, and the sea occupies the sea and the sea. Möngke Khan's purpose in dispersing the territory of Ögedai Khan was to reduce the power of the princes and so that his descendants would no longer have the power to compete with the Great Khan's court.

In the Chagatai clan, the chief opponent of Möngke was the fifth son, Yesu Möngke, because of Yesu Möngke's opposition to Möngke, Guiyou Khan put him in the Chagatai Khanate, and after Möngke ascended the throne, he issued an edict to let Harahule rule the Chagatai Ulus, and ordered Yesu Möngke to be executed. Unfortunately, Khara Ulkhu died upon his arrival in the Altai region, and his wife, Ulukhunaikhadun, executed Yesu Möngke and held power for ten years. Because Chagatai's grandson Bri insulted Batu, Möngke Khan delivered him to Batu to be put to death.

Meng Ke Khan ruled the law strictly, and the nobles were guilty of the same crime as the common people. When the kings Tachar and the concubine Tiriyan led their troops to pass through Dongping, they plundered the people and horses, and were rebuked by Möngke Khan. Troops were punished for destroying the people's crops, framing others for personal vendettas, and stealing during the march. Hazar's son, Yegu, was deprived of his military power because he framed the Tara camp with personal grudges during the conquest of Goryeo, which violated the "Zasa", and was replaced by Tharat Tai Huoerchi.

Diaoyu City is located on the Diaoyu Mountain on the south bank of the Jialing River in Heyang Town, Sichuan, covering an area of only one square kilometer. There is a flat boulder on the mountain, and it is said that there is a giant god who fishes for fish in the Jialing River here to relieve the hunger of the people, and the mountain is named after it. Diaoyu City cliffs, ancient city gates, city walls are majestic and solid, Jialing River, Fujiang River, Qujiang River are surrounded on three sides, as if it is a soldier's majestic pass.

At that time, the Song and Mongolian wars had broken out, and the soldiers and civilians of the Southern Song Dynasty chose steep mountain passes to build cities and fortresses along the main rivers and transportation arteries of Sichuan, which were dotted and supported each other to form a complete strategic defense system. Diaoyu Castle is the core of this mountain city's defense system and the strongest fortress.

Diaoyu City is divided into inner and outer cities, and the outer city is built on the cliffs, and the city walls are made of stones. The castle has large fields and abundant water throughout the season, as well as many arable fields in the surrounding foothills, all of which allow Diaoyu Castle to rely on natural hazards and hold on to it for a long time. Wang Jian, the defender of Hezhou, further improved the city construction, and the people in the border areas of Sichuan avoided the rebellion here, and Diaoyu City became a strong fortress with enough soldiers to eat.

The new Mongol Khan Möngke invaded the south in three ways, Möngke was the most outstanding Mongol Khan after Genghis Khan, he was taciturn, did not like extravagance and overeating, and his greatest pleasure was to expand his territory like his ancestors. As early as when Meng Ke ascended the throne, he established a military plan for the complete destruction of the Song Dynasty, and established a strategic policy for the empire to focus on Sichuan and destroy the Southern Song Dynasty from west to east.

This time, Meng Ge personally led the main force of 40,000 troops, known as 100,000 troops to invade Sichuan, the Mongol army's attack was very smooth, defeating the Southern Song Dynasty Liu Quan's troops, CD, Pengzhou, Hanzhou, Huai'an, Mianzhou and other places surrendered one after another. In less than a year, the Mongol army occupied almost all of Sichuan, and Meng Ge's army reached Hezhou along the Jialing River. Behind Hezhou is Chongqing, and further east is the middle and lower reaches of the Yangtze River with low terrain and flat Sichuan, and Sichuan is in an emergency.

All eyes were suddenly focused on Hezhou, concentrated on the Diaoyu City, the seat of Hezhou, and Wang Jian, the governor of Hezhou, had already mobilized 170,000 people from his county to strengthen the Diaoyu City, ready to hold on. After a large area of Sichuan fell into the hands of the enemy, soldiers and civilians from all over the country fled east one after another and came to Hezhou to assemble, and Diaoyu City suddenly became an important town inhabited by more than 100,000 people, becoming the last danger to stop the Mongol army.

At first, Möngke did not use it as an obstacle in his path, and the Mongol army advanced too smoothly, and the prefectures and counties of Sichuan surrendered one after another. Möngke did not experience any tough battles, and he had reason to believe that the Diaoyu City in Hezhou would follow in the footsteps of other states and counties and surrender to the Mongol army. Meng Ge sent the surrendered Jin Guobao to Diaoyu City to persuade him to surrender, Wang Jian invited Jin Guobao to the training ground, beheaded the public, he told the soldiers and civilians in the city: "The time for the decisive battle has come!" Jin Guobao died a very valuable death, which immediately aroused the passion of the Diaoyu City military and civilian resistance.

Meng Ge finally understood that he would usher in the first and last tough battle of this Sichuan campaign in Diaoyu City.

The Mongol army was the first to attack, and the Mongol army launched a series of fierce attacks on the castles around Diaoyu City, hoping to open the way to the core city of Diaoyu City, but was met with stubborn resistance from the Song army, and the fierce offensive and defensive battles soon became stalemate. Heavy rain fell in eastern Sichuan for 20 days in a row, and as soon as the sky cleared, the Mongol army attacked the Huguo Gate in the south of the city, but did not succeed. Late the next night, the Mongols broke through the Yizi City from the Qimen to the side of the Jialing River in the north of the city, and entered the outer city of Diaoyu City.

That night, the death squads of Diaoyu City raided the Mongol camp and drove the Mongol army out of the outer city. After entering May, the hot summer in Sichuan arrived, and the Mongol army from the north was not adapted, and diseases broke out. At this point, the Mongol army had been under the Diaoyu City for four months, and there was no progress, and the morale of the army began to decline, but the morale of the army and the people in the Diaoyu City was high after four months of fighting. The Song army also took advantage of the cover of night, often opened the city to assault, harassing the Mongol army, the Mongols were extremely unsuitable for such a method of warfare, and they were all in order at night, and did not dare to cross the thunder pond.

The Diaoyu City could not be attacked for a long time, and Meng Ge became irritable and gathered his subordinates to discuss the next strategy. The general thought that the Mongol cavalry was not suitable for attacking the dangerous mountain city that was heavily defended, and that the current large army was stranded in Diaoyu City, which was very unfavorable to the overall strategic layout of Mongolia. He suggested that Meng Ge leave only a small army to besiege Diaoyu City, and the main force should move east along the Yangtze River, enter Hubei by land and water, join forces with Kublai Khan, and destroy the Southern Song Dynasty according to the original plan.

This is a correct opinion that the Mongol army should make use of its strengths and avoid its weaknesses, and give full play to the characteristics of the Mongolian army's flexibility, ferocity, and fierceness to destroy the Southern Song Dynasty. Unfortunately, the opinion of Shusu Kuri was categorically rejected by Möngke and other generals, and the long-term victory created an atmosphere of arrogance and conceit among the Mongol army, and Shusu Kuri was regarded as a pedantic and cowardly man, and finally the meeting reached an agreement to continue the siege.

The Mongol army met to intensify the offensive, day and night. One night, the general Wang Dechen also attacked the outer city of Ma Junzhai, it seemed that success was in sight, when the sky was about to dawn, the sky suddenly rained, the Mongolian army siege ladder was broken again, the army was forced to retreat. Wang Dechen was very unwilling, and wandered under the Diaoyu City on horseback alone, while investigating the situation of the city, he also wanted to recruit the defenders. The officers and soldiers of the Southern Song Dynasty did not let go of this opportunity, and faced Wang Dechen with bows and arrows and cannons, Wang Dechen was hit by a sudden cannon stone, was seriously wounded, and died in the temple of Jinyun Mountain.

Wang Dechen was the general of the Jin Dynasty that Meng Ge relied on the most, and he was also the vanguard of the Mongol army, and his death caused a great psychological blow to Meng Ge. Meng Ge choked his hands and felt restless as he looked at the Diaoyu City, which had been unable to be attacked for a long time.

Diaoyu City has been besieged for almost half a year, but the Southern Song Dynasty defenders are high-spirited, and Meng Ge just can't figure out how the more than 100,000 people in the city get supplies and military supplies. Until one day, the defenders of the Southern Song Dynasty deliberately threw two fresh fish weighing 15 kilograms, hundreds of steamed dough cakes and a letter out of the city. The letter said that Diaoyu City began to hoard supplies a few years ago and prepare for war, and now the city is full of supplies, even if it is defended for another ten years, it will not let the Mongolian army capture the city.

Meng Ge suddenly realized that his mood was even worse, compared with the defenders of the Southern Song Dynasty, the situation of the Mongolian officers and soldiers outside the city was very bad. The war dragged on for a long time, and the Mongols were not adapted to the hot and humid climate, and the eastern part of Sichuan in June and July was the scorching summer season, so the Mongolian officers and soldiers were not only demoralized, but also suffered from heat stroke, malaria, cholera and other diseases, and the Mongolian army had become a tired army.