Kwanbuk is a region in North Hamgyong and South Hamgyong Provinces of North Korea. The region may once have been occupied by the Okjeo people. It was later controlled by Goguryeo and then Balhae, and subsequently contested by Goryeo and the Jurchen nation. The term Kwanbuk is no longer widely used. Hangul is the native alphabet used to write the Korean language, as opposed to the hanja system borrowed from China. ... Hanja, or hanmun, sometimes translated as Sino-Korean characters, are what Chinese characters (hanzi) are called in Korean. ... The Revised Romanization of Korean (Korean: 국어의 로마자 표기법; 國語의 로마字 表記法) is the official Korean language romanization system in South Korea. ... McCune-Reischauer romanization is one of the two most widely used Korean language romanization systems, along with the Revised Romanization of Korean, which replaced (a modified) McCune-Reischauer as the official romanization system in South Korea in 2000. ... North Hamgyŏng (Hamgyŏng-pukto) is a province of North Korea. ... South Hamgyŏng (Hamgyŏng-namdo) is a province of North Korea. ... Okjeo was a small tribal state which arose on the East Sea coast very early in the Common Era. ... Goguryeo (traditional dates 37 BCE – 668) was an empire in Manchuria and northern Korea. ... Alternate meaning: Bohai Sea Balhae (Korean) or Bohai (Chinese) was a kingdom in northeast Asia from AD 698 to 926, occupying parts of Manchuria, northern Korea, and Russian Far East. ... The state of Goryeo ruled Korea from the fall of Silla in 935 until the founding of Joseon in 1392. ... The Jurchens (Chinese: 女真, pinyin: nǚzhēn) were a Tungusic people who inhabited parts of Manchuria and northern Korea until the seventeenth century, when they became the Manchus. ...

See also

• Eight Provinces of Korea
• Geography of North Korea