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Protected by its great wall and by three thousand years of history, the Middle Kingdom felt forever safe from invaders. That was counting without the hordes of nomadic horsemen who came from the Mongolian steppes, commanded by Kublai. The great Kublai Khan, grandson of Gengis Khan, was born in 1214. He was the very incarnation of twelve centuries of invasions of sedentary civilisations by nomadic people.
