Iran-Azerbaijan Interactions and its Impacts on North-South Corridor

In 1379, North-South Corridor, consisting of eastern wing (Central Asia), middle wing (Caspian Sea), and western wing (Caucasus), form the side of the Caspian Sea, has been implemented by Russia, India, and Iran. Until 1399, the western wing, which passes Azerbaijan territory as the main route, has been affected by security issues between the Islamic Republic of Iran and the Republic of Azerbaijan after the collapse of the USSR. The main question of the present paper is: how do the tensions between the Republic of Azerbaijan and the Islamic Republic of Iran affect the western wing of the North-South Corridor from the side of the Caspian Sea? The findings of the research that has been concluded on the basis of the Copenhagen Regional Security theory, geoeconomic theory, and document-and-library-based studies, indicate that security issues (Karabakh crisis) and the tensions between the Republic of Azerbaijan and the Islamic Republic of Iran have put excessive costs on the western wing of the North-South Corridor which has been replaced with the Eastern wing affected by Russia-Ukraine war.