Chadae (71–165, r. 146–165) was the seventh king of Goguryeo, the northernmost of the Three Kingdoms of Korea. Although his wife is unknown, he had at least a son named Prince Chu'an () who escaped from the palace after King Sin ascended the throne and then asked the king to spare his life and pardoned later.
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.《三國史記》 卷第十五 髙句麗本紀 第三: 次大王, 諱遂成, 大祖大王同母弟也. 勇壯有威嚴, 小仁慈. 受大祖大王推讓, 即位. 時年七十六.
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,《三國史記》 卷第十五 髙句麗本紀 第三: 三年, 夏四月, 王使人殺大祖大王元子莫勤. 其弟莫徳恐禍連及, 自縊. 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.冬十月, 椽那皀校勘 024衣明臨荅夫, 因民不忍, 弑王. 號爲次大王. According to the Samguk yusa, the subsequent king Sindae killed both Chaedae and Taejo.
See also History of Korea Three Kingdoms of Korea List of Korean monarchs
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