Background and rise to the throne

According to the Samguk Sagi, he was the younger brother of the previous king Taejo the Great. He was said to be brave but cruel.

During his brother's reign, Chadae successfully repelled attacks by Han Dynasty China, and gained power within the Goguryeo court. After eliminating opponents, including Go Bok-jang, he eventually received the throne from Taejo, who was probably forced to abdicate in 146.

Reign

Chadae continued to consolidate power even after rising to the throne. In the third year of his reign, he ordered the deaths of Taejo's two sons, forced one of his brothers to commit suicide, and persecuted his youngest brother Baekgo (later King Sindae).

Following several natural disasters and civil unrest, he was killed by his minister Myeongnim Dap-bu, according to the Samguk Sagi. According to the Samguk Yusa, the subsequent king Sindae killed both Chaedae and Taejo.

王系譜的異說

『三國史記』高句麗本紀

┏━大祖大王（宮）

┣━次大王（遂成）

┗━新大王（伯固）━┳━故國川王

　　　　　　　　　　┣━發岐（抜奇）

　　　　　　　　　　┣━山上王（伊夷謨）━━東川王（位宮）

　　　　　　　　　　┗━罽須

『後漢書』高句驪伝

宮━━遂成━━伯固

『三國志』高句麗伝

宮━━伯固

三國史記將宮、遂成、伯固三代王看成是兄弟，結果在一百多年內只有三兄弟為王，其真實性令人懷疑。如果太祖王真的是121年死，遂成、伯固最可能是宮的曾孫，當然也不排除是宮的孫子的可能性。