Genghis Khan originally tried to establish a peaceful trade route with the Khwarezmid Empire, but the local governor made the fatal error of executing the Mongol ambassadors.

A closer look

Genghis Khan originally tried to establish a peaceful trade route with the Khwarezmid Empire, but the local governor made the fatal error of executing the Mongol ambassadors. In response, Genghis Khan abandoned his ongoing war in China, marched hundreds of thousands of troops across the continent, and essentially deleted the entire empire from the face of the Earth. He even diverted a river through the birthplace of the sultan just to erase it from existence. This is what happens when you mess with the courier service of a guy who considers mass destruction a casual weekend hobby. Next time you complain about a delivery fee, remember that terrible customer service in the thirteenth century resulted in the systemic annihilation of an entire civilization