The Great Battle (Hangul: 안시성; Hanja: 安市城; RR: Ansi-seong; lit. Ansi Fortress) is a 2018 South Korean historical war film directed by Kim Kwang-sik. It stars Jo In-sung, Nam Joo-hyuk, and Park Sung-woong. The film was released in South Korea on September 19, 2018.
In 645 AD, the Tang Dynasty’s emperor Li starts his invasion into Goguryeo, one of the ancient kingdoms of Korea. One victory after another, the Tang army marches into Ansi, protected by General Yang, the lord of the fortress. Abandoned by his country and outnumbered by thousands, the brave general gathers his men and women to face the Tang army on his own.
- Movie: The Great Battle (English title) / Ansi Fortress (literal title)
- Revised romanization: Ansisung
- Hangul: 안시성
- Director: Kim Kwang-Sik
- Producer: Koo Tae-Jin, Kim Yong-Sun
- Release Date: September 19, 2018
- Runtime: 135 min.
- Distributor: Next Entertainment World
- Language: Korean
- Country: South Korea
- Jo In-sung as Yang Man-chun
- Nam Joo-hyuk as Sa-mul
- Park Sung-woong as Li Shimin