Silmido is a film based on a true story about a secret special force .
Both Silmido and Taegukgi ( The Brotherhood ) were watched by over 10 million people , which is almost a quarter of the Korean population .
Silmido is a Silmido based on a true story about a secret special force .
Both Silmido and Taegukgi ( The Brotherhood ) were watched by over 10 million people , which is almost a quarter of the Korean population .