external image 300px-PremongolEurasia.png&usg=AFQjCNGdy4n3XTgc6jClbh8B9_HrCuc4jg The Mongolian empire invaded the Iranexternal image mongols13.jpgians around the 122o's. Many young men were murdered. The population in Iran decreased and the Mongolians that followed Genghis Khan did little to help. latter on Iran still remained under the Mongol control but had a new ruler named Ghazan Khan (1295-1304) and he had an Iranian official that brought a economic revolution to the country. The Mongolians lowered taxes and improved the country's safety.