Noktundo

Noktundo
Korean name
Hangul	녹둔도 / 록둔도
Hanja	鹿屯島
Transcriptions Revised Romanization Nokdundo McCune–Reischauer Noktundo / Roktundo
Russian name
Russian	Ноктундо

Noktundo is a former island in the delta of the Tumen River on the border between Primorsky Krai and North Korea. The area of the island was 32 square kilometres (12 sq mi).

In the 15th century, Noktundo belonged to the Joseon Dynasty of Korea. In 1587 there was a battle fought on this island between the Jurchen and the local garrison under the control of Yi Sun-sin, a national hero of Korea.

At the time of the shallowing of the northern branch of the Tumen, the course of the river changed from time to time. As a result, the island of Noktundo was sometimes joined with the mainland of Primorsky Krai. Regardless, the island remained under Korean jurisdiction.

Under the 1860 Convention of Peking, the Qing Dynasty ceded the island to the Russian Empire. This became a matter of protest to the Koreans, who claimed that the Qing had no authority to do so. In 1990, the former Soviet Union and North Korea signed a border treaty which made the border run through the center of the river leaving territory of the former island on Russian side. South Korea refuses to acknowledge the treaty and demanded that Russia returns the territory to Korea.