In the Mongolian-Song War, the Mongolian Khan's attack on the Song Dynasty was a circuitous battle. His tactics of destroying Dali around Yunnan and bypassing the flank of the Song Dynasty destroyed the chain of defense zones on the Yangtze River in the Southern Song Dynasty to some extent.
125 1 year, Mongolia inherited the status of Mongolian Khan, first put down the internal rebellion and consolidated its dominant position. Then set out to attack the Song Dynasty and set up a garrison base in the border area near the Southern Song Dynasty. In the direction of Sichuan, the Mongolian army built cities in Mizhou (now Lueyang, Shaanxi) and Lizhou (now Guangyuan, Sichuan) and developed wasteland in Bailong River. In the direction of Jingxiang, Henan Economic and Strategic Department was set up to station fields in Tang (now Tanghe, Henan Province), Deng (now Henan Province), Song (now Songxian, Henan Province), Ru (now Runan, Henan Province) and other cities, and Tang and Deng were stationed in Xiuzaoyang (now Hubei Province), Guanghua (now laohekou city, Hubei Province) and danjiangkou city, Hubei Province. Along the Huaihe River and Huaihe River, he settled in Cai (now Runan, Henan Province), (now Xixian County, Henan Province), Bo (now Bo County, Henan Province), Ying (now Puyang, Henan Province) and stationed troops in Bo, Ying and other States.
The Southern Song Dynasty knew that Mongolian cavalry were good at galloping and fighting, and gradually formed a defense policy of guarding the upper reaches of the Yangtze River and consolidating the lower reaches, and guarding the Han and Huai rivers to shield the Yangtze River. In the Sichuan Theater, Yu Jiye, a general of the Song Dynasty, took defensive measures to keep the point and control the surface, and successively established deep echelon defense with Chongqing as the center, Yuzhen (now Dongyu Mountain in Hechuan, Sichuan) as the shield pillar, the Yangtze River as the support, and the newly built mountain cities beside Minjiang River, Jialing River, Fujiang River and Qujiang River as the backbone. In Jinghu War Zone, Meng gǒng, the ambassador of Song appeasement system, recruited troops and deployed troops, strengthened troops in Jiangling, Xiangfan (now Hubei) and Ezhou (now Wuchang, Wuhan), and cultivated land in Daxing to prevent Mongolian troops from crossing Kuimen and advancing eastward along the river, and implemented a three-tier defense deployment. In the Jianghuai war zone, the Song Dynasty built castles in military towns and key points, and increased garrison troops. The castles were within a hundred miles of Fiona Fang, three miles and one ditch, and five miles and one canal, in order to curb the long drive of Mongolian cavalry. At the same time, clever warships were built, and guerrillas were formed by mixing water steps, stationed in the middle reaches of the Yangtze River and on standby at any time.
In view of the shortage of water army, it is difficult to cross the natural barrier of the Yangtze River. Meng Ge took a strategic detour and attacked the Song Dynasty from flank and flank. In July of the second year of Mong Ge Khan (1252), Mong Ge ordered his younger brother Kublai Khan to lead an army to conquer Dali (now Yunnan). In September of three years, Kublai Khan led the army to Tela (now Dalagou, Diebu County, Gansu Province), and the soldiers were divided into three roads to the south. Uriyangqatai led the marked army to enter Yunnan along yandang road (now Aba Grassland in Sichuan) via Tubo. Wang Zong copied and merged, and only led the East Route Army through Maozhou (now Mao Wen, Sichuan) to Huichuan (now Huili West, Sichuan) to contain it; Kublai Khan led the Middle Route Army, crossed the Dadu River through Mantuo City (now Hanyuan North, Sichuan), went south through Qingxi Ancient Road, crossed the valley of 1000 km, and entered the Jinsha River at 1 1 month. /kloc-in early February, the East Route Army and the Middle Route Army crossed the Jinsha River successively, and joined forces with the West Route Army at Longshouguan to jointly attack and annihilate the main force of Dali Army. 1February 15, occupying Dali city. In the spring of four years, Kublai Khan left Uriyangqatai to continue fighting and came back with a soldier. In autumn, Uriyangqatai's army occupied Shanzhan (now Kunming) and captured the king Duan Xingzhi. In five years, with the help of Duan Xingzhi, he conquered all parts of Dali.
In the sixth year of Mong Gehan (1256), in June, Mong Gehan decided to attack Song with two wings in the name of Song prisoner. On the right, Uriyangqatai attacked Sichuan from Yunnan, Tiege Huoluqi, Dell from Zizhou and Xingyuan (now Hanzhong, Shaanxi); On the left, King Tahar and son-in-law Tie Li were ordered to attack Song Huaichao. On the right-wing North Road, the army railway Hogg Luchi and Dejdar went down the Jialing River, went south through the canal, and arrived near Chongqing on 1 1 month. Uriyangqatai, the right-wing South Road, led an army to attack Wumeng (now Zhaotong, Yunnan) in September and headed for Shimen (now northwest of Gaoxian, Sichuan). In October, he defeated Song Jun in Mahu River, won 200 warships and diverted eastward. Along the south bank of the Yangtze River, land and water went hand in hand, turned north in Chongqing, and joined forces with Tiege Huoluqi and Daidaer Army near Hezhou (now Hechuan, Sichuan) in December. In the spring of the seventh year of Mongolia (1257), in order to consume the strength of the Southern Song Dynasty, Mongolia once again ordered the generals to attack the Song Dynasty. Occupy Chengdu and Xiangyang within two years. The following year, he attacked the Song Dynasty again, and successively captured Ezhou, Kuzhuguan, Yunshan City, Dachuocheng, Qingju City (now Nanchong, Sichuan) and Daliang City (now Guang 'an East, Sichuan), and marched to Wusheng Mountain (now near Wusheng County, Sichuan), approaching the fishing city. The defense line of Sichuan in the Southern Song Dynasty was almost broken.
In the fishing city, Mungo was seriously injured in sweat and died soon. As a result, the Mongolian army was cleared. However, the death of Mongolian Khan did not change Mongolia's strategic encirclement of the Southern Song Dynasty. Soon Kublai Khan ascended the throne, the Yangtze River defense line was breached, and the Southern Song Dynasty perished.
Further reading: Mongo destroys Dali
Khan Mengge of the Mongol Empire chased Yuan Xianzong. Tuo Lei's eldest son, Genghis Khan's youngest son and Wokuotai's adopted son. Not ostentatious, not extravagant, like hunting. In the Mongolian-Song War, Mongolia adopted a strategic detour strategy, which was conducive to breaking through the natural barrier of the Yangtze River. However, the battle of Dali lasted for seven years, hundreds of thousands of people died in Shima, and the offensive power was weakened. The main force entered Sichuan, because it was mostly in the deep mountains, which was not conducive to giving full play to the advantages of cavalry and could not be captured for a long time. Although Mongolian Khan failed to destroy the Song Dynasty, it destroyed the overall defensive posture of the Southern Song Dynasty and enabled Kublai Khan to actively destroy the Song Dynasty.