Battle of Xiangyang

The Battle of Xiangyang (traditional Chinese: 襄陽之戰; simplified Chinese: 襄阳之战; pinyin: Xiāngyáng zhī zhàn) was a protracted series of battles between the Yuan dynasty and the Southern Song dynasty from 1267 to 1273. The battle was a significant victory for the Yuan dynasty and ended a 30-year defensive campaign waged by the Southern Song dynasty, allowing Yuan forces to advance into the Southern Song heartland. The capture of Xiangyang also allowed the Yuan dynasty to take control of the Han and Yangtze rivers, thereby depriving the Southern Song dynasty of two formidable natural barriers. The defeat devastated the Southern Song dynasty, which collapsed several years later at the Battle of Yamen.

The battle consisted of skirmishes, ground assault, and the siege of the twin fortified cities of Fancheng and Xiangyang in modern-day Hubei, China. Lü Wenhuan, commander-in-chief of the Southern Song dynasty, surrendered to Yuan Emperor Kublai Khan in 1273. The conventional use of Mongol cavalry was restricted by the woody terrain and numerous military outposts of the Southern Song. Chinese firearms and cannons were employed by the Yuan in the victorious siege of Fancheng after capturing the outposts and relieving Southern Song forces from Sichuan and Yuezhou, which broke through the siege but was eventually defeated. The use of the counterweight trebuchet by the Yuan proved especially effective.

Before the rule of Kublai Khan, the Mongols had launched military campaigns as far as Eastern Europe, and had conquered Russia, Siberia, Tibet, Korea, North China, Yunnan, Iraq, Anatolia and Iran. However, the Song dynasty was difficult to conquer because of the strategic location of Xiangyang, which became a vital position for Kublai to capture and hold. The city guarded the waterways of South China because the Han River was a major tributary into the Yangtze river. Once the city fell, the Mongols obtained easy access into important Southern cities in China and the Southern Song would collapse shortly after.

The Southern Song knew the importance of this vital spot, and treated the defense of Xiangyang as important as their capital. The city was surrounded by mountains on three sides, and a river (Han river) on one side. Song stored massive amount of supplies inside the fortress, as preparation for long sieges. They also built high walls and towers on all four sides of the fortress. Each entrance of the fortress had at least two layers of walls, used to trap enemy sieging forces inside.

In 1133, the famous Song general Yue Fei led many successful campaigns against the Jin dynasty, in the Xiangyang area. From there, he pushed the Jin army back north as far as Kaifeng. In 1234, the Jin dynasty was conquered by the Mongols under the leadership of Ögedei. At that time, Mongols and the Southern Song dynasty were allies. After that, the two former allies did not have any common enemy. The Song killed Mongol envoys and attempted to invade the Mongol territories.

Xiangyang surrendered to the army of the Mongol Empire without resistance in 1236. But the Mongols voluntarily left the city after it was briefly held by them in 1236–38. The twin cities of Xiangyang-Fenchang, with walls almost 5 kilometers around and 200,000 people, withstood a Mongol assault in 1257. The Mongolian cavalry were lured in Xiangyang where they were slaughtered by the Song defenders due to the fortress's double-layered wall design. When a Mongol contingent entered the entrance of the fortress, the Mongol forces would be slaughtered to the last man, while trapped between four walls. The Mongols lifted the siege of Xiangyang. The sudden death of Möngke Khan forced the imperial army of the Mongol Empire to withdraw from the Song territory in 1259–60.

In 1260, Kublai Khan was proclaimed successor to the throne after the death of his brother Möngke, as was his youngest brother Ariq Böke. The succession war between him and Ariq Böke began. Kublai Khan won the war eventually, though his claim as the successor to Möngke was only partially recognized by the Mongols in the west. In 1271, Kublai Khan renamed his empire "Yuan", establishing the Yuan dynasty, instead of "Ikh Mongol Uls" (Great Mongolian Nation or Great Mongol Empire). After defeating his rivals and opponents in Mongolia and Northern China, Kublai Khan also wanted to continue his grandfather Genghis Khan's conquest of China. In 1267, Kublai Khan ordered Aju and the Song defector Liu Zheng to attack Xiangyang and Fancheng. General Lu Zende had levied corruption charges against Liu Zheng, the Luzhou prefect, causing Liu Zheng to defect to the Mongols in 1261

Aju and Liu Zheng arrived in 1268 and blockaded the city with a ring of forts. Liu Zheng had advised the cities be starved from Sichuan by building forts there. The Mongols probed the defenses of Xiangyang and Fancheng. The Yuan-Mongols learned from their mistake, and this time brought along with them about a hundred trebuchets. These trebuchets had a shooting range of around 100 metres, and could use projectiles of around 50 kg. During Mongol campaigns against the Jin dynasty, the Mongols used about 5,000 trebuchets, and they were very successful in destroying the Jin fortresses. Lu Wende commanded the Song dynasty's Yangtze and his son-in-law Fan Wenhu and son Lu Wenhuan commanded Xiangyang.