[1] During World War II, he served as an officer in the Imperial Japanese Army.

In April 1950, he started a second term as a Chief of Staff (Rank: Major general).

Following the outbreak of the Korean War, the Republic of Korea Army collapsed rapidly.

On 30 June 1950, Chae Byong-duk was dismissed and he transferred to South Gyeongsang Province Defence Command.

[2] He was posthumously promoted to Lieutenant General after his death by the South Korean government.