In A.D. 1235, the Mongolian army went south, and Chengdu in northwest Sichuan fell. The Mongolian army then divided into four roads and went deep into the hinterland of Sichuan to plunder. When the news came, the States were in a panic. "The East and West States were completely defeated in mid-April." The Mongolian army entered Shu, burning and looting all the way, and Sichuan suffered this disaster, which was devastated and devastated; The past cities have become rubble, and the past fertile fields have not been harvested. Chengdu has the most concentrated population, and the losses are particularly heavy. He Jingfu, a general in the Southern Song Dynasty, later retired from the Mongolian army and entered Chengdu to clean up the bones in the city1400,000, which is beyond calculation outside the city. The Shu people who survived the robbery fled everywhere, and the population of each state in Sichuan was "seventeen eight". This year, fifty-four states in Sichuan were breached, and only Luzhou and Hezhou were kept.
Although the Mongolian army temporarily withdrew from Sichuan, the invasion of Sichuan never stopped. Mongolian cavalry took turns to rob and slaughter Chengdu and other counties, attacked Chengdu again, captured Chen Longzhi, commander-in-chief of the Song Dynasty, and returned with a large number of troops. The life of Shu people is still extremely unstable. Luzhou and Hezhou became the only safe haven for Shu people. After 1234, refugees and defeated soldiers from Sichuan flocked to Luzhou, and the difficult houses had no fixed place. Soldiers invaded local residents in the name of looking for a small family, and the whole city of Luzhou was in chaos. However, it never rains alone. 1236, a fire suddenly broke out in Luzhou city, and the houses in the city were adjacent to each other and instantly turned into scorched earth. People can't escape, countless people died in the fire. According to the statistics of the Song Dynasty, it costs "105,000 yuan and 3,600 meters" to rebuild Luzhou City, which makes the border defense in Sichuan, which is already stretched, increasingly difficult.
124 1 year, with the successive fall of Chengdu and Jiazhou (now Leshan City), Luzhou, which lost its barrier, could not escape the fate of urban destruction. The History of Song Dynasty records the fall of Chengdu and Leshan, resulting in numerous casualties. When the Mongols captured Luzhou, they killed everyone they saw. At that time, Luzhou corpses were everywhere, and everyone who saw them was chilling.
1242, Yu Jie, a famous soldier in the Southern Song Dynasty, made an oath of "slapping the whole Sichuan to repay the debt to the DPRK" and volunteered to come to Sichuan as the appeasement ambassador of Sichuan and presided over the defense of Sichuan. Yu Jie followed Zhuge Liang's rule of Shu, "gathering all the people's will and benefiting all the people." He posted a list of talents in Shu, selected defenders, punished defeated soldiers, and rectified the military and political affairs.
1243, in the Song Dynasty, Sichuan Anfu ambassador Yu Jie ordered the governor Cao Zhida to build the Arm City and moved Luzhou to this place. In the same year, the Mongols attacked Shu again. Under the leadership of Yu Jie, Song Jun fought "36 battles" with the Mongolian army, captured the generals of the Mongolian army in Dadu River and swept them away. Yu Jie once led the army in the Northern Expedition and fought against the Mongols in Xingyuan (now Hanzhong) and Wenzhou (now Wenxian, Gansu). Yu Jie ruled Shu 10 years, and the Mongols never took any advantage.
1253, Song Lizong listened to the slanderers of treacherous court officials, ordered the relieving of Yu Jie's military power and recalled North Korea. Yu Jie swallowed his anger and killed himself, and the people of Shu all shed tears. With the abnormal death of Yu Jie, the soldiers in Sichuan were leaderless, and the already perfect Sichuan defense was in a state of fragmentation.
1260, Liu Zheng was appointed as the deputy envoy of Tongchuan Road and Luzhou appeasement in Song and Sichuan. Liu Zheng was originally from Jingzhao Fan Chuan. After he entered Shu, his achievements were outstanding and he was promoted step by step. He was called "Iron Sun Hu", and the generals in the south were jealous of him and regarded him as a "northerner". Amid the praise, Liu Zheng didn't take his boss seriously, and the contradiction intensified day by day, which eventually led to his rejection. Because of his meritorious service, he was jealous and framed by Jiasidao Group, so he could not appeal to the court. 1262, Liu Zheng, desperate, surrendered to the Mongolian army with 300,000 people in Luzhou 15 county, and the city of Arm of God fell for the first time.
The Mongolian army is based in Luzhou, and most of the more than 60 States in Sichuan belong to the Mongolian army. In the Southern Song Dynasty, "more than twenty states, the so-called more than twenty states are barren, or one state, one county, or one county and one township".
1262, in the Song Dynasty, Fu Xuan, Sichuan, made Lv Wende recover the city of Arm of God. From the third year of Xianchun (1267) to the sixth year of Xianchun (1270), Sichuan and Mongolia provinces also attacked Lu three times, but all failed.
After suffering heavy losses for a long time, the Mongolian army finally listened to the strategy of Liu Zheng, commander-in-chief of Luzhou, shifted the focus of the attack from Sichuan to Xiangfan and sent Liu Zheng to attack Xiangyang.
In September (1267), Kublai Khan ordered an attack on Xiangyang and sent Liu Zheng to Xiangyang to besiege Xiangfan with Asu, commander-in-chief of Mongolian army. The military and civilians in Xiangfan resisted tenaciously, and the six-year defense war of Xiangfan, which was related to the fate of the Southern Song regime, began, and the Song-Mongolian War entered a turning point. Liu surrounded Xiangyang city without fighting for nearly five years, cultivated a powerful water army for Mongolia and won Xiangyang. Since then, the Yuan Army has been in a state of overwhelming power, and the Southern Song Dynasty is irreversible.
1June, 273, in the year of Mei Yingchun in Song Luzhou, another yuan was invested, and the castle fell again. In June of the first year of Deyou (1275), Jiading and its cities along the river surrendered, and Luzhou fell. When Yuan Xichuan's army arrived at the gates of Ba Shen, the Anfu ambassador of Song Tongchuan, Mei Yingchun of Zhi Jiang 'an and Zhao Jin surrendered without fighting. Yuan changed Jiang Anfu to Luzhou, leaving Mei Yingchun to defend, the army continued to advance eastward, and Dongchuan army attacked Chongqing. 1June, 276, Zhang Jue, the deputy envoy of Song Dynasty to Sichuan, sent Zhao An, Wang Li, under the guidance of Liu Lin, a righteous man in Luzhou, to lead the Hezhou army, cooperate with Hejiang people in the city, recover the city, execute Mei Yingchun, capture the family of General Yuan Xichuan, and force the Xichuan army around Chongqing to return to Li for assistance.
In the second year of Jingyan (1277), in the spring of the 14th year of Yuan Dynasty, the Yuan army went hand in hand, encircled the Arm City of God, and stopped Song Hezhou's reinforcements. In November, "Luzhou is exhausted, and people eat each other", and the words of the matchmaker are exhausted. Song persuaded the surrender and others to die, and the city of Arm of God was finally breached. After the war, Luzhou College moved back to its original site.
In the 16th year of Jiading in Song Dynasty (1223), the population of Sichuan-Shaanxi 4th Road was 2.59 million, while in the 19th year of Zhiyuan (1282), it was only1200,000, which was less than 5% of that of Song Dynasty. Jiangyangpu also records that Luzhou had an original population of more than 40,000 households, with only 1 10,000 households left at the beginning of the Yuan Dynasty (mostly fleeing from other places).