Geopolitical Skim Changes in the Northern Borders of Iran

The total of the borders of the Islamic Republic of Iran are 8755 Kilometers including marine borders (2700 Kilometers)، riverine borders (1893 Kilometers) and mainland borders (4162 Kilometers). There are 3 edgy rivers in the north of the country. The northern borders of Iran such as mainland and riverine borders and Caspian Sea، were verified during some events in Russian Tsars، CCCP age. The international changes during 19th and 20th centuries and decreasing of the authority of the Qajar dynasty lead the constriction of the borders of Iran and separating some parts of that. Contemporary with extinction of CCCP، Iran neighbored some countries that have gained their freedom recently and it led to the formation of new territorial and marginal pretensions. Iran neighbored Turkmenestan، Armenia and Azerbaijan from the north. The border of Iran and old CCCP which was made Caspian Sea and riverine borders about 2643 Kilometers. This research is based on the analytic-descriptive method and by using data such as maps، tables and statistics we studied geopolitical changes on Iran''s northern borders and checked it with a scientific method and reviewed these changes. We tried to answer this question that what was the process of the changes of the northern borders of our country.