Original sentence: His invasions, and strategy of slaughtering the entire population of resisting cities such as Herat, led to as many as 15 million direct deaths, and resulted in massive long-term deaths throughout the areas conquered by the Mongols, including declines of about a third in the populations of China, Iran, and Afghanistan.The exact number of people killed during and after his reign is not conclusively known
Edited sentence: His Mongol armies invaded and killed millions in regions such as China, the Middle East and Central and Eastern Europe.His success in consolidating his conquests ended centuries of internal conflict.His unequivocal loyalty to Mongol tradition, religious tolerance, multiculturalism, trade and success have all made him a national hero.Many Chinese citizens revere him as the founder of their Yuan Dynasty.Others vilify him for his ruthless strategy of killing entire towns and cities if they resisted invasion.The exact number of people killed during and after his reign is not conclusively known but is often exaggerated