In the 1st a reasonable time of 13th century, Genghis Khan unified the Mongolian tribes, founding the Mongolian Empire, and led them to overcome many Asia, Central Asia, Russia and center East. Their armies occupied a fantastic component of nations in europe, too, maternity to at least one or more the largest empires ever. Their cavalry things, specially their horse archers, were Genghis Khan's elite troops and handled, with tough but well coordinated expenses, striking terror because of their enemies' hearts.