GOGURYEO - DAE JO YOUNG
Dae Jo-yeong (died 719), also known in Korea as King Go (Hangul: 고왕, Hanja: 高王), established the state of Balhae, reigning from 699 to 719. His origin is heavily disputed (see below); most Korean scholars believed that he was of Goguryeo heredity, but most scholars in China believed that he was of Mohe (Malgal) ancestry.
1 Background and Early life
2 Establishing Balhae
3 Death and Succession
4 Controversial origins
6.1 Republic of Korea Navy
7 See also
9 External links
 Background and Early life
Dae Jo-yeong was the first son of general Dae Jung-sang (Hangul: 대중상, Hanja: 大仲象) or Qiqi Zhongxiang (Chinese: 乞乞仲象 pinyin: Qǐqǐ Zhòngxiàng) of Goguryeo, and was born in an unknown place.
After the fall of Goguryeo to the Silla-Tang armies, Dae Jung-sang remained in a part of Goguryeo which had not been attacked during the 3rd Goguryeo-Tang war. After, Dae Jung-sang was against the Tang. In the confusion of the Khitan uprising led by Li Jinzhong against the Tang (Zhou) in May 696, Dae Jung-sang led 8,000 Goguryeo remnants peoples, the Sumo Mohe people, to Dongmo mountain. And the Baishan Mohe leader Geolsa Biu (Hangul: 걸사비우, Hanja: 乞四比羽 pinyin: Qǐsì bǐyǔ), made an alliance and sought independence.
 Establishing Balhae
The Tang killed Geolsa Biu, and Dae Jung-sang also died. Dae Jo-yeong integrated the armies of Goguryeo people and some Malgal tribes and resisted Tang's attack. His overwhelming victory over the Tang at the Battle of Cheonmun-ryeong (Hangul: 천문령, Hanja: 天門嶺) enabled him to continue on his father's empire. He claimed himself the King of Jin in 698, and established "Jin state" (Hangul: 진국, Hanja: 辰國). He put his capital at Dongmo Mountain in the south of today's Jilin province, and built Dongmo mountain fortress, which was to become Jin's capital.
He attempted to expand his influence in international politics involving the Tang, the Göktürks, the Khitan, Silla and some independent Mohe tribes. At first he dispatched an envoy to the Göktürks. Then he reconciled himself with the Tang when Emperor Zhongzong was restored to the throne.
In 712, he renamed his empire, Balhae. In 713 he was given the titular title of "Prefecture King of Balhae" by Emperor Xuanzong. Upon reaching a period of rest within the empire, King Go made it clear that Silla was not to be dealt with in a peaceful stance because they were the ones who received the help of the Tang to conquer Goguryeo, which was the predecessor state to Balhae. This aggressive stance towards Silla was continued on by his son and successor King Mu of Balhae.
 Death and Succession
Dae Jo-yeong died in 719, and his son Dae Muye assumed the throne. Dae Jo-yeong was given the posthumous name "King Go."