R-Point

R-Point is a 2004 South Korean psychological horror war film written and directed by Kong Su-chang. Set in Vietnam in 1972, during the Vietnam War, it stars Kam Woo-sung and Son Byong-ho as members of the South Korean Army in Vietnam. Most of the movie was shot in Cambodia. Bokor Hill Station plays a prominent part of the movie, in this case doubling as a French colonial plantation. In 2011, Palisades Tartan re-released this film on DVD under the title Ghosts of War.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.