Historians estimate that the Mongols killed 40 million people--women and children included. Fierce, ruthless warriors, the Mongols were protecting an enormous empire spanning much of Asia and Europe. From Genghis Khan to his equally notorious son Ogedai Khan, this volume introduces readers to one of the bloodiest wars ever fought. Historical images highlight some of the most devastating moments, such as the conquest of Baghdad, while chapters focusing on the Mongols' battle tactics show readers just how they conquered so much land. A detailed timeline organizes the history of the empire for readers' reference.