Monguls really were barbarians

It was reportedly first introduced to Europe when Mongols lobbed plague-infected corpses during the siege of Caffa in the Crimea in 1347. The Genoese traders fled, bringing the plague by ship into Sicily and Southern Europe, whence it spread.
Reall gorilla warfare saw it on history chanel .

And then they fought the Hells Angels in Laughlin.

Seek out Dan Carlin's Wrath of the Khans. Hours and hours of everything you ever wanted to know about Gengis Khan and his sons.
Five part series, I remember really loving it. Very entertaining, with little left out.