Similarities between the 12.12 Coup and Sejo's Gyeyu Jeongnan

1. Justification
(1) 12.12 Coup: Martial Law Commander Jeong Seung-hwa is a traitor.
(2) Gyeyu Jeongnan: Grand Prince Anpyeong conspired with idol Kim Jong-seo and Chief State Councillor Hwangbo In to revolt.
2. Background
(1) 12.12 Coup: The crisis faced by Chun Doo-hwan, who was about to be demoted from the Combined Intelligence Agency and the Security Command.
(2) Gyeyu Jeongnan: Grand Prince Suyang's anxiety that he would be permanently distanced from power.
3. Composition
(1) 12.12 Coup: The Hanahoe military organization, prepared over a long period.
(2) Gyeyu Jeongnan: Key armed forces in the capital and the palace guard, mobilized through the strategist Han Myeong-hoe.
4. Purge Operations
(1) 12.12 Coup: A total sweep of anti-coup forces.
(2) Gyeyu Jeongnan: A total sweep of anti-Suyang forces.
5. Public Sentiment
(1) 12.12 Coup: Public sentiment was at its worst.
(2) Gyeyu Jeongnan: Public sentiment was at its worst.
6. Opposing Forces
(1) 12.12 Coup: The Gwangju Democratization Movement.
(2) Gyeyu Jeongnan: The Rebellions of Yi Jing-ok, Yi Si-ae, etc.
7. Aftermath
(1) 12.12 Coup: Roh Tae-woo's June 29 Declaration and the direct presidential election system.
(2) Gyeyu Jeongnan: Joseon gradually declined through Sejo's direct descendants, such as Yeonsangun, Seonjo, and Injo.