How they conquered more land in 25 years than the Romans did in 400. How they controlled more than 11 million contiguous square miles. And you may even have read that the Mongols basically created nations like Russia and even Korea. One historian has even claimed that the Mongols smashed the feudal system and created international law. And with religious tolerance, the Mongols, in this view, created the first great free trade zone, like a crazy medieval Eurasian NAFTA. And that's not entirely wrong either. Stupid truth always resisting simplicity.