evidence: Korea (Korean: 한국, romanized: Hanguk in South Korea, or 조선, Chosŏn in North Korea) is a peninsular region in East Asia consisting of the Korean Peninsula (한반도, Hanbando in South Korea, or 조선반도, Chosŏnbando in North Korea), Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically divided at or near the 38th parallel; in 1948, two states declared independence, both claiming sovereignty over the entire region: North Korea (Democratic People's Republic of Korea; DPRK) in its northern half and South Korea (Republic of Korea; ROK) in the south, which fought the Korean War from 1950 to 1953. The region is bordered by China to the north and Russia to the northeast, across the Amnok (Yalu) and Duman (Tumen) rivers, and is separated from Japan to the southeast by the Korea Strait. [...] The Three Kingdoms of Korea consisted of Goguryeo, Silla, and Baekje. Silla and Baekje controlled the southern half of the Korean Peninsula, maintaining the former Samhan territories, while Goguryeo controlled the northern half of the Korean Peninsula, Manchuria and the Liaodong Peninsula, uniting Buyeo, Okjeo, Dongye, and other states in the former Gojoseon territories.[19]