Mongols vs Chinese Profiles Historic & History
More than anything else, I think the Mongols were terrifying. They didn't fight "Fairly" by modern standards. If they came across a settlement with tall walls, they would resort to whatever methods necessary. When I was in school, I remember a teacher telling me about how they would hurl the bodies of those that died of deadly diseases over the walls, exposing the city to the sickness. Eventually, it would spread so much that the civilians would surrender and the city would be lost. When you heard that the Mongols were headed towards you, it was terrible news.