Caucasia

Caucasus
The "mesopontic" geographic region of land which lies between the Black and Caspian Seas, consisting of both the North Caucasus Region and Transcaucasia, and traversed by the Caucasus Mountains; the northern boundary of this region is roughly on a line extending from the Don to the Volga River deltas, and the southern boundary generally coincident with the lower course of the Aras River.