Wikipedia
Silmido is a 2003 South Korean film, directed by Kang Woo-suk. It is based on the true story of Unit 684, though parts of the film are extrapolations as the actual details of events are unknown. The film was both critically well received and a financial success, and was the first film in South Korea to attract a box office audience of over 10 million viewers.
Silmido (Silmi Island) is an uninhabited island next to Muuido (Muui Island) in the Yellow Sea, on the west coast of South Korea. It has 0.25081km2 land area and 6 km circumference. It is 20 km from Incheon Metropolitan City of southwest and is about 5 km away from Incheon International Airport. Silmido is connected two times a day to Muuido as mud flat. Most of this island consists of mountains that are around 80m high.
Silmido became historically significant when it was used as the training ground of Unit 684 army group. On 1968, January 21, North Korea’s guerrillas infiltrated the border and reached till Segumjunggogae ( Sinyeong-dong, Jongno-gu) of Seoul to attack the Blue House to assassinate the President Park Chung-hee. From this 1.21 state, the Central Intelligence Agency of South Korea built 209th Detachment, 2325th Group ( unit 684- 1968. April) in revenge. At that moment, unit 684 members had to endure hellish training for three years and four months. However, during the training period, South Korean government decided to follow policy that ties the two countries. From that, Unit 684 members escaped Silmido to mutiny. However, they were invested by government troops in Youngdungpo-gu Daebang-dong. Then, Unit 684 group committed suicide in a stolen bus on August 23, 1971.
After the novel Silmido (1999) of Baek Dong-ho was published, Silmido became known. The movie Silmido (2003) of Kang Woo-suk hit 10 million audiences, and Silmido's history was known. Nowadays, even after the movie set is already gone, many people go to this island to feel historical base.