IntroductionManchuria (mănchŏrˈēə) [key], Mandarin Dongbei sansheng [three northeastern provinces], region, c.600,000 sq mi (1,554,000 sq km), NE China. It is officially known as the Northeast. Manchuria is separated from Russia largely by the Amur, Argun, and Ussuri rivers, from North Korea by the Yalu and Tumen rivers, and from Mongolia by the Da Hinggan (Great Khingan) Mts. It includes the Liaodong peninsula. Until 1860 it included territory now in Siberia and until 1955 territory now in the Inner Mongolian Autonomous Region. Provincial divisions have changed frequently, but since 1956 Manchuria has comprised Jilin, Heilongjiang, and Liaoning provs. Much of the region is hilly to mountainous. The Da and Xiao Hinggan (Great and Lesser Khingan) in the north and the Changbai in the east are the greatest ranges.
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