A desperate, starving crowd of thousands presses together, smothering each other in the narrow city streets; defenders clad it broken or hastily repaired lamellar armour hurry to and fro, responding to new alerts along the city walls; the constant thundering of stone slamming into the city walls; the loud cracks of bombs exploding, lobbed into houses by the enemy siege weapons and setting them alite. Screams, some ongoing and others cutting off suddenly, marking where a poor defender, foolish enough to stick his head over the ramparts, was struck by arrows. Outside the city, smoke billowed up enemy sieges machines set on fire by the defender. Beyond them, was the whinnying of tens of thousands of Mongol horses, with Chinese subjects and allies sharpening swords and preparing for the assault. Such was life in the nearly year-long siege of Kaifeng, capital of the Jin Empire and now the target of the Mongol war machine. Today, we look at the final collapse of the Jurchen ruled Jin Dynasty, ending the twenty year long Mongol conquest of Northern China. Victory here laid the groundwork for Mongol war with the masters of southern China, the Song Dynasty, setting the stage for a conflict which would eventually leave the Mongols the rulers of the Middle Kingdom. I’m your host David and this is Ages of Conquest: The Mongol Invasions!        We’ve covered the early stages of the Mongol-Jin war in previous episodes but to give a quick recap. Mongol armies under Chinggis Khan had invaded the Jin Empire in 1211. The Jin, ruled by the Jurchen, hailing from Manchuria and ancestors of the later Manchu, controlled China north of the Huai river and had enjoyed a fearsome military reputation, renowned for their heavy cavalry and horse archers. But after nearly a century of their rule, the semi-nomadic Jurchen in China had adopted Chinese culture and language, losing their formidable military edge. Jin armies were routinely swept away in the field by the Mongols, and those Jurchen and Khitans who still lived as nomads or semi-nomads were soon allied with Chinggis Khan. In 1215, the Emperor Xuanzong of Jin fled south of the Yellow River, abandoning the capital of Zhongdu, now modern Beijing, and cutting ties to his Manchurian homeland. Formerly hardy horsemen, the final emperors of the Jin Dynasty, though still ethnically Jurchen, were now little different from the Chinese. Their armies were now made up of Chinese infantry, having lost most of their access to horse producing regions. Defections from the Jin army early on in the war brought the Mongols knowledge of Chinese siege weapons, and soon the fortifications of northern China were reduced one by one.  When Chinggis Khan moved against the Khwarezmian Empire in 1219, the Jin were granted no respite, as the talented commander Mukhali was left to continue pressure on the Jin. Only Mukhali’s death in 1223 granted the Jin a brief rest, with Mongol attacks for the next few years becoming decidedly more limited.       The Jin had been in an unenviable position from 1215-1223. Mongol pressure in the north was unrelenting and of great concern, bringing the losses of hundreds of thousands of soldiers and civilians. In the west, the Tangut ruled Xi Xia, former Jin vassals, had submitted to the Mongols and joined them in attacking the Jin. In the east, the Shandong peninsula and surrounding coastline was lost to a local insurrection known as the Red Coats, an umbrella term for a collection of independent warlords, some of whom declared for the Mongols, some who declared for the Song Dynasty, and all hating the Jin. The Chinese Song Dynasty ruled almost all of China south of the Huai river,  and were a formidable economic power as well as being longtime foes of the Jin. Having lost their northern territories, and two emperors, to the Jurchen in the early 1100s, few tears were shed in the Song court for the Jin’s struggles. In 1217 the Jin invaded the Song- a shocking development considering their ongoing