In the spring of 1221, tragedy befell on the people of Nishapur, a city located in modern day northeast Iran. The city was under siege by Genghis Kahn’s armies. An archer, trying to defend the city, landed an arrow in the heart of Kahn’s son-in-law. In retaliation, the daughter of Genghis Kahn ordered the annihilation of all the men, women, and children. Kahn’s army killed 1.7 million Nishapurians, completely wiping out the entire population of the city.