The Silmido (2003) film is based on the true story of Unit 684, a South Korean special forces unit created in 1968 to assassinate North Korean leader Kim Il-Sung following an assassination attempt on South Korea's president. The unit was composed of 31 prisoners and death row inmates promised a new life if they succeeded. The mission was eventually canceled, but the unit remained active for years, leading to a mutiny in 1971 before the unit was disbanded and its members executed or imprisoned.
- Origin: After North Korean commandos attempted to assassinate President Park Chung-hee in January 1968, the South Korean government decided to form a secret unit to retaliate by assassinating North Korean leader Kim Il-Sung.
- Recruitment: The government recruited 31 criminals and death row inmates, who were promised pardons and a chance to start a new life in exchange for participating in the mission.
- Training: The unit was sent to the island of Silmi-do for intensive and brutal training for two years.
- Mission canceled: The mission was canceled before it could be launched.
- Mutiny: The unit was largely forgotten, and the soldiers were left stranded on the island. In August 1971, the surviving members of the unit revolted, killing most of their trainers and commandeering a bus to travel to the presidential office in Seoul.
End: After a confrontation with the South Korean army, the remaining rebels blew themselves up with grenades, and the four survivors were later executed.