The Soldier (2005)

Directed by Wuttikhun Khongcharoenwut

A group of civilians join the Army temporarily as volunteers to combat drug trafficking and border incursions near Burma. On an exercise into the jungle they find a place full of strange figures. They go back to base and discuss their findings with a monk. A Karen woman says the place is haunted. The monk says it isn't and goes back in there with them to prove it but they are captured by the Karen rebels.