During his life, the Mongol Empire eventually occupied a substantial portion of Central Asia. After founding the Mongol Empire and being proclaimed 'Genghis Khan', he started the Mongol invasions and raids of the Kara-Khitan Khanate, Caucasus, Khwarezmid Empire, Western Xia and Jin dynasties. He came to power by uniting many of the nomadic tribes of northeast Asia. Genghis Khan was the founder, Khan (ruler) and Khagan (emperor) of the Mongol Empire, the largest contiguous empire in history. Genghis Khan Aoki Ookami to Shiroki Mejika IV is the fourth game in the Genghis Khan series that began on the NES console and the second one on the Playstation console. Japanese Menus and gameplay are in Japanese.