Estonia–Russia border

The Estonia–Russia border is the international border between the Republic of Estonia (EU and NATO member) and the Russian Federation (CIS and CSTO member). The border is 294 kilometres (183 mi) long. It emerged during World War I, in 1918, as Estonia declared its independence from the then warring Russian and German Empires. The border goes mostly along the national, administrative and ethnic boundaries that have gradually formed since the 13th century. The exact location of the border was a subject of Estonian–Russian dispute that was resolved with the signing of the Border Agreement, but neither Russia nor Estonia have completed its ratification yet. It is an external border of the European Union.