DangunDangun or Tangun (; tan.ɡun), also known as Dangun Wanggeom (; tan.ɡun waŋ.ɡʌm), was the legendary founder and god-king of Gojoseon, the first Korean kingdom, around present-day Liaoning province in Northeast China and the northern part of the Korean Peninsula. He is said to be the "grandson of heaven" and "son of a bear", and to have founded the kingdom in 2333 BC. The earliest recorded version of the Dangun legend appears in the 13th-century Samguk Yusa, which cites China's Book of Wei and Korea's lost historical record Gogi (; 'Ancient Record').
Samguk SagiSamguk Sagi (, History of the Three Kingdoms) is a historical record of the Three Kingdoms of Korea: Goguryeo, Baekje and Silla. The Samguk Sagi is written in Classical Chinese, the written language of the literati of ancient Korea, and its compilation was ordered by King Injong of Goryeo (r. 1122-1146) and undertaken by the government official and historian Kim Busik () and a team of junior scholars. Completed in 1145, it is well known in Korea as the oldest surviving chronicle of Korean history.
BaekjeBaekje or Paekche (, pɛk̚.t͈ɕe) was a Korean kingdom located in southwestern Korea from 18 BC to 660 AD. It was one of the Three Kingdoms of Korea, together with Goguryeo and Silla. While the three kingdoms were in separate existence, Baekje had the highest population of approximately 3,800,000 people (760,000 households), which was similar to that of Goguryeo (3,500,000 people) and much larger than that of Silla (850,000 people). Baekje was founded by Onjo, the third son of Goguryeo's founder Jumong and Soseono, at Wiryeseong (present-day southern Seoul).
GoguryeoGoguryeo (37 BC–668 AD) (; ko̞ɡuɾjʌ̹; : high castle; Old Korean: Guryeo) also later known as Goryeo (; ko.ɾjʌ; : high and beautiful; Middle Korean: 고ᇢ롕〮, Gowoyeliᴇ), was a Korean kingdom located in the northern and central parts of the Korean Peninsula and the southern and central parts of modern day Northeast China. At its peak of power, Goguryeo controlled most of the Korean Peninsula, large parts of Manchuria and parts of eastern Mongolia and Inner Mongolia as well as Russia.
HanjaHanja (Hangul: ; Hanja: , ha(ː)ntɕ͈a), alternatively known as Hancha, are Chinese characters () used in the writing of Korean. Hanja was used as early as the Gojoseon period under the first Korean kingdom. Hanja-eo (한자어, ) refers to Sino-Korean vocabulary, which can be written with Hanja, and hanmun (한문, ) refers to Classical Chinese writing, although Hanja is also sometimes used to encompass both concepts.
BalhaeBalhae (Korean: 발해; pa̠ɽɦɛ̝, , Бохай, ), also rendered as Bohai, was a multi-ethnic kingdom established in 698 by Dae Joyeong (Da Zuorong) and originally known as the Kingdom of Jin (震, Zhen) until 713 when its name was changed to Balhae. At its greatest extent it corresponded to what is today Northeast China, the northern half of the Korean Peninsula and the southeastern Russian Far East. Balhae's early history involved a rocky relationship with the Tang dynasty that saw military and political conflict, but by the end of the 8th century the relationship had become cordial and friendly.
