To recreate the battle at Doo-Mil-Ryung, the scene required 15,000 bullets, 3,000 extras and 500 stunt experts. Instead of rifles being fired, fist fights were the main focus of the scene and all of the cast were specially trained. The shoot lasted three weeks with about 50 minor accidents a day on average, but the scene was finally wrapped without any major accidents.
The South Korean briefing in 1951 just before one of the characters escapes to North Korean lines mentions an attack on Hills 931 and 851. This is a reference to the Battle of Heartbreak Ridge, which occurred in September and October 1951.
The second film to sell over 10 million tickets in South Korea after breaking the highest grossing record set earlier by Silmido (2003).
Official submission of South Korea for the 'Best Foreign Language Film' category of the 77th Academy Awards in 2005.
No other UN soldiers are seen in the film other than South Koreans, despite the very large role that they played in the war. Likewise, the Chinese, who would be the principal Communist force after late 1950, are only seen once or twice in the entire film.