Stan, why are you always making history boring? So the Mongols apparently didn't have flying horses, but they were uncommonly adaptable. So even though they'd never seen a castle before they started raiding, they became experts at siege warfare by interrogating prisoners. And they also adopted gunpowder, probably introducing it to Europeans. And they even built ships so they could attack Japan. That might have worked too, except there happened to be a typhoon. Also, people were terrified of the Mongols.