Historical geopolitics of the Caspian Sea, relying on Persian resources; World Ibn Bakran’s letter and geography of Hafez Ebro

Caspian Sea has been and has been a prominent position ever since Among these resources, the world is the letter and geography of Hafez Ebro, both of which are written in Persian, the first in the late sixth and early seventeenth. centuries, and the latter in the late eighth and early nineteenth centuries In general, it can be said that these two works cover the geography of Iran from the fifth to the eighth centuries of the AH. In these works, the authors describe the position of rivers and mountains around the sea in the description of the Caspian Sea. This article is also an analytical-descriptive method, which seeks to clarify the references and descriptions of the writers of the writer of these two works . The achievement of this article can be a source of interest for interested people to use such studies to take advantage of the natural geography of the Caspian Sea for various affairs in the country.