The Caspian Sea, the largest land-locked enclosed body of water on Earth, has been an exclusive economic zone of Russia and Iran for nearly 300 years. Originally, the status of the Caspian Sea was enshrined in the Treaty of Rasht signed by the Russian Empire and Persia in 1729. It was then specified by a number of rider agreements between the two countries. The last such agreement signed between the Soviet Union and Iran in 1940 described Caspian as an enclosed sea that belonged to the two countries. Read More
