Unit 684

"They revolted because they felt that they were never going to get the chance to go to North Korea and that they would never be allowed to leave the island. They were in despair."

- Yang Dong Su, guard of Unit 684, on why they revolted

209th Detachment, 2325th Group, commonly known as Unit 684, nicknamed Silmido Unit, was a black operation team of the Republic of Korea Air Force (ROK Air Force). Created in response to the failed assassination attempt on South Korean President, Park Chung-hee. Their main mission was to assassinate North Korean President, Kim Il-sung.

Unit 694, just like it's northern counter part Unit 124, was made up out of 31 men. They were either petty criminals or unemployed youths who who were promised money and jobs if they succeeded in their mission. The members were harshly trained on the uninhabited island of Silmido, in the Yellow Sea, off the coast of Incheon. Seven members of the unit died during training. Following an improvement in intra-Korean relations, the unit's assassination mission was cancelled.

On August 23, 1971, for reasons which remain unclear, the members of Unit 684 mutinied, killed all but six of their guards, and made their way to the mainland, where they hijacked a bus to Seoul. The bus was stopped by the army in Daebang-dong, Dongjak-gu, Seoul. Twenty members of the unit were shot or committed suicide with hand grenades. The four survivors were sentenced to death by a military tribunal and executed on March 10, 1972.

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