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I found this information which stated that a few years before Mongols decided to invade Central Asia (Khawarzmid Empire), Genghis Khan sent a message to the muslim ruler, Ala ad-Din Muhammad, offering "I will rule the rising sun, and you can/will rule the setting sun". But somehow (maybe the sultan killed Genghis' envoy, I forgot) he rejected it, and caused the Mongol Horde to rain down hell on the entire Central Asia.

But what if he aggreed to the offer? Will we see the entire Europe and Islamic world spared from devastation by the Mongol?

Thanks in advance!
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