Following this treaty, as well as the 1813 Treaty of Gullistan, Russia had finished conquering all the Caucasus territories from Qajar Iran what is now Dagestan, eastern Georgia, Azerbaijan, and Armenia, all of which had formed part of its very concept for centuries.[4] The area north of the Aras River, such as the territory of the contemporary nations of Georgia, Azerbaijan, Armenia and the North Caucasian Republic of Dagestan, were Iranian until they were occupied by Russia during the 19th century.[5][6][7][8][9][10]