unrepentant, unrighteous people; No grudges, no steel people.

- Dongxiang proverb

There is a Chinese idiom called crossing a river and demolishing a bridge, which means that when you cross the river, you will tear down the bridge, and after you have achieved your goal, you will kick the people who have helped you away.

If the Jin Kingdom is compared to a big river, and the Southern Song Dynasty is compared to a bridge built on a big river, then the Great Mongolia Kingdom is the one who walked across the bridge and immediately dismantled the bridge.

In 1234, the Great Mongols and the Southern Song Dynasty jointly attacked and finally eliminated the common enemy of the Jin Kingdom on both sides.

Badr was depressed since he was killed by a thunderbolt, and he didn't have the heart to fight for Okotai anymore.

Naturally, Ogedai was not satisfied with Badr's performance, but, considering that he was his father's righteous son after all, and that he had made great achievements, he had to send him to lead a small army into the central capital of the former Jin Kingdom.

Ali led his wife Sauron and son Nuhai and followed Badr's army into the middle capital. They lived in a wing of the Badr Mansion and continued to serve the Badr family, and after 15 years of wandering, they finally lived a stable life.

Nuhai is smart and lively, with a pair of big sparkling eyes, a high nose bridge, dark hair, and a completely following Ali in appearance, which is deeply loved by Ali and Sauron.

The main force of the Mongol army began to retreat towards the Mongol headquarters, leaving the city army in the Han region of the Central Plains and Henan empty.

The Southern Song Dynasty naively believed that since the invader Jin State had been eliminated, then the northern land occupied by the Jin State should naturally return to its own arms. Therefore, the Southern Song Dynasty planned to occupy Tongguan in the west, hold the Yellow River, and recover the three capitals of Tokyo Kaifeng, Xijing Luoyang, and Nanjing Guide in the east, so as to recover the homeland of the Great Song Dynasty.

The Great Mongol State categorically would not allow the Southern Song Dynasty to do this. Because it considered itself the liberator of this fertile land, which rightfully belonged to the Great Mongolian State.

Therefore, when yesterday's ally, the Southern Song army, marched north to occupy Luoyang, the Mongol army launched a ferocious blow against them, forcing the Southern Song army to suffer heavy losses and retreat on all fronts.

Under the pretext that the Southern Song Dynasty violated the previous alliance between the two sides and seized land without authorization, Wokotai sent two Mongolian armies to attack the Southern Song Dynasty: one was led by the prince Kuochu to attack the Jingxiang region in Hubei, and the other was led by the prince Kuoduan to attack Sichuan.

The Western Route Army led by Kuoduan recruited the troops of Wang Shixian, a former general of the Jin State, at Gongchang (present-day Longxi, Gansu Province), and then, with Wang Shixian as the vanguard, entered Chigu (present-day southeast of Kangxian County, Gansu Province) from Fengzhou (present-day Fengxian County, Shaanxi Province), and then marched to Mian Prefecture (present-day Luoyang County, Shaanxi Province).

It was an important western gateway to the Southern Song Dynasty and has always been a battleground for soldiers. After many plunders by the Jin army and the Mongol army, there was no city to protect the citizens on the outskirts of Chuzhou, and there was no abundant financial resources in the city to recruit soldiers. The battles of the guards of the Southern Song Dynasty soldiers were fierce and auspicious.

Gong Guangzu, a descendant of Gong Huaizhou and the eldest son of Gong Wanli, served as a military staff officer and assisted the general Cao Youwen in managing the army.

Before the battle, Cao Youwen and the deputy commander had a conflict over the right to command. Gong Guangzu painstakingly persuaded the two generals that the great enemy should put the safety of the country first, unity is gold, and division is ash.

However, the two generals did not give in to each other, which led to the division of the entire army and the strength was greatly weakened.

Gong Guangzu had no choice but to follow coach Cao Youwen to meet the battle in a hurry. He led his soldiers to hold their positions on the slopes of the mountains, and planted the banners of the Southern Song army all over the mountains, while deliberately beating drums and shouting in order to confuse the enemy. However, in the face of the Mongol army, which was superior in military strength, Cao Youwen and Gong Guangzu were unable to block the attack of the strong enemy and were forced to retreat.

In the autumn of 1236, they retreated to Da'an (located in the territory of Ningqiang County, Shaanxi Province). Da'an has no danger to defend, and there is no food or water, only an ancient castle on the Cockscomb Mountain can be garrisoned, if it is only garrisoned, it can barely last for five days.

After discussing with Gong Guangzu, Cao Youwen decided that Gong Guangzu and his younger brother Cao Wan led 10,000 men to stick to Jiguan Mountain (southwest of present-day Mianxian County, Shaanxi); He led 7,700 elite soldiers to cross the river from Da'an for 300 miles, and set up an ambush in the valleys around Liuxi and Heishui.

Gong Guangzu and Cao Wan were ordered to lead their troops to fight the invading Mongol army outside the mountain pass. In the evening, they sounded the gong and returned to the ancient castle of Jiguan Mountain.

The Mongol army swarmed and tracked, encircling the three layers of the ancient castle of Jiguan Mountain.

When Cao Youwen learned that the Mongol army had passed through Da'an, he immediately ordered his army to brave the torrential rain to march quickly to Yangping Pass, divided into three routes and entered the camp of the Mongolian army, breaking dozens of battalions in a row, and advancing straight into Yangping Pass.

Gong Guangzu and Cao Wan in the ancient castle of Jiguan Mountain heard the sound of war drums outside the ancient castle, and immediately led their soldiers to rush out of the ancient castle and wiped out half of the Mongolian army.

The results of the Southern Song Dynasty army were crushed by the Mongolian reinforcements who arrived later, and finally because they were outnumbered, their combat effectiveness was greatly reduced, so they had to break through and retreat.

Cao Youwen was hit by an arrow and fell off his mount during the retreat, but he still insisted on fighting until he died heroically.

Gong Guangzu and Cao Wan fled into the castle with the only remaining 500 people.

The next day, Gong Guangzu and Cao Wan did not see the arrival of reinforcements from the Southern Song Dynasty, and saw that the castle had no food to eat, so they once again led their officers and soldiers to break through the siege, and retreated to Longmen (located in Yangping Pass, in present-day Mianxian County, Shaanxi Province) while fighting.

Gong Guangzu's younger brother Gong Yaozu led the rescue army to rush to Longmen, and the tragic scene in front of them shocked them, and they wanted to cry without tears, and their hearts and intestines were broken: Gong Guangzu, Cao Wan and other 500 soldiers were all killed. Bloody corpses were scattered across the valley. The branches were hung with the heads of the officers and soldiers of the Southern Song Dynasty.

With tears in his eyes, Gong Yaozu buried the bodies of his brothers with the soldiers, and vowed to avenge the dead officers and soldiers.

The angry roars of the Southern Song Dynasty soldiers resounded in the sky.

Gong Yaozu led the Southern Song Dynasty army to quickly occupy Yangping Pass, attacked from both sides, defeated the Mongolian army of tens of thousands of people, and avenged the sacrifice of the soldiers.

Gong Yaozu led his army to the north and recovered the key pass of Xianren Pass (southeast of present-day Huixian County, Gansu Province), forcing the Mongol army to reluctantly withdraw from the territory of the Southern Song Dynasty.

Seeing the failure of the attack on the western part of the Southern Song Dynasty, Ogedai began to fight the idea of the eastern part again. In winter, he assigned the Mongol king Kouwen Buhua to lead a large number of troops to attack the Huaixi region.

The Southern Song Dynasty guards in Qizhou (present-day Qichun, Hubei Province), Shuzhou (present-day Qianshan, Anhui Province), and Guangzhou (present-day Huangchuan, Henan Province) were terrified and fled in order to save their lives.

Kouwen Buhua took advantage of the victory to collect the soldiers, horses, grains and weapons of the three states, and then sent the Mongol cavalry from Xinyang to attack Luzhou (now Hefei, Anhui Province), and at the same time, sent the general Chahan to lead the army to attack Zhenzhou (now Yizheng, Jiangsu Province).

Qiu Yue, the governor of Zhenzhou, ruled the army strictly, defended tightly, and defeated the Mongol army besieging the city.

Gong Runzu, the third son of Gong Wanli, remembered Qiu Yue's instructions to capture the thief and capture the king first, and set his sights on a general of the Mongol army at Xupu Bridge (present-day Yizheng West, Jiangsu Province) and shot him off his horse with an arrow.

The general vomited blood from his mouth, and his legs twitched a few times before he died.

When the Mongol soldiers saw the sacrifice of their commander, they were immediately shocked, and they were so frightened that they retreated.

Qiu Yue considered that the Mongol army was 10 times his own and could not fight hard, so he discussed with Gong Runzu to arrange three ambushes on the enemy's inevitable path, and set up artillery in Xicheng, so as to wait for work and win by surprise.

When the Mongol army entered the ambush circle, Gong Runzu ordered the condescending ambush to attack, and the artillery and stones were fired together, so that the Mongol army turned on their backs and collapsed.

The Southern Song army won the Battle of Zhenzhou and avenged the soldiers who died on the Western Front.

In 1238, Wokotai still did not give up on the attack on the Eastern Road of the Southern Song Dynasty, actively prepared for war, made a large number of siege equipment, led by the Marshal Chahan of the Mabu Army, the so-called 800,000 troops, attacked the Huaixi region again, planned to conquer Luzhou and then build ships in Chaohu, and then enter the Yangtze River moat.

Du Gao of Zhilu Prefecture borrowed Gong Runzu from Qiu Yue of Zhizhou of Zhenzhou, and made thousands of strings of buildings with rich experience in defending the city, which were arranged on the shore of Haogou. The string of buildings is made of trees as vertical timbers, inserted into the soil for five or six feet, more than one zhang high, covered with horizontal timbers on top, there is an arrow window in the middle, and sheep and horses are used as walls under the line. Three cannons are erected on each floor.

Unexpectedly, the Mongol army also built a 60-mile-long earthen city outside the city, surrounded the city of Luzhou from the outside, and built a platform with a height of more than a series of towers, standing on it to observe the dynamics of the defenders in the city.

Du Gao ordered the soldiers to scatter the oil on the haystacks, then burned the platforms of the Mongol army, and also erected seven floors of facilities like goose wings in the string of buildings, and installed cannons on them to bombard the high platforms of the Mongol army.

The Mongol officers and soldiers panicked and had to retreat in disarray.

Gong Runzu's army and 500 militiamen who went to support the army pursued the victory and beat the Mongolian soldiers who fell behind the group, causing heavy casualties to the Mongol army.

Du Gao also sent naval troops and elite troops to guard strategic points along the Huai River, blocking the retreat of the Mongol army, and implementing the strategy of closing the door and fighting dogs.

Cha rarely failed to conquer Luzhou, transferred troops to the east, and was repeatedly defeated, so he had to return to the division and retreat north.

The Southern Song Dynasty court found that the Mongol Eastern Route Army had gathered forces to attack the Lianghuai region, and relaxed its attack on the middle reaches of the Yangtze River, and took the opportunity to issue an edict to recover the Jingxiang region.

Meng Heng, the hero of the Southern Song Dynasty, believed that in order to recover Xiangyang and Fancheng (present-day Xiangyang, Hubei Province), he must first obtain Yingzhou (present-day Zhongxiang, Hubei Province), which could be used as a base for transporting grain and other strategic materials, and then capture Jingmen (present-day Jingmen, Hubei Province) before he could surprise his army.

Meng Heng went to Yuezhou (now Yueyang, Hunan Province) to take up his post and recruited Gong Runzu under his command. Together, they conscientiously studied and analyzed the enemy's situation and worked out a detailed combat plan.

When the conditions were ripe, he immediately ordered Gong Runzu to lead his soldiers to attack Zuntou, Fancheng, Langshenshan and Xiangyang.

After Meng Heng recovered Xiangyang, he asked the imperial court to station heavy troops in Xiangyang and establish an important military town. Then, he summoned the surrendered Han soldiers in Xizhou (now Xixian County, Henan) and Caizhou (now Runan, Henan) to establish the Loyal Guard Army, summoned the Han people who surrendered in Xiangzhou, Yingzhou and other places to create the vanguard army, recruited 359 Anhui people to establish the Ningwu Army, and recruited more than 100 Uighur warriors, 115 old and young and 260 horses to establish the Flying Eagle Army and other armies, which were unified under the command of Gong Runzu.

Meng Heng took Jiangling as a base, Xiangyang as an important town, and greatly developed Tuntian. Gong Runzu strengthened the training team and improved its combat effectiveness. The Southern Song Dynasty took a great turn for the better in the Jingxiang battlefield.

The wars between the Great Mongolia and the Southern Song Dynasty continued, and the internal disputes were also continuous.

In the winter of 1241, Ögedei suffered a stroke and died soon after. The power of the Great Mongol State fell into the hands of the Khan Empress Naimajin.

In 1246, Ögedei's son, Ōrjin Guiyu, succeeded him as the third Great Khan of the Great Mongol State. Although Guiyou reigned for only two years, he brought the unruly Tibet to the Great Mongolian State.

After Guiyou's death, Ogedei's eldest brother Jochi's son and Guiyou's cousin Batu opposed the third uncle Ogedei's son to inherit the throne and insisted on appointing his fourth uncle Tulei's eldest son, who was also his cousin's son, Gejin Möngke, as the Great Khan.