I was listening to Dan Carlin's podcast about the Khan's, and I didn't realize that the Mongols were able to kick the Europeans butt's so thoroughly. I thought their interaction was minimal. Carlin presented it like the Mongol's were used to fighting in "the big leagues" (China), while Europeans were the minor leagues. That is the first I've heard of China being considered the military big leagues. Rome was in Europe a thousand years prior and I'd consider them "big league". Did Europe sorta forget about military strategy in the interim? I'm not aware of societies in China being anything special other than the Mongols. Is that ignorant American schooling? Or is Carlin exaggerating a bit?