For the most part, North Asia (more widely known as Siberia) is considered to be made up of the Asian part of Russia solely. The geographic region of Siberia was the historical land of the Tatars in the Siberia Khanate. However Russian expansion essentially undermined this and thus today it is under Russian rule. There are roughly 40 million people living in North Asia and the majority consists now of Ethnic Russians. However, many East Asians also inhabit the region, and historically they have been the majority before Russia's expansion east.