R-Point (2004)

The military is shocked when they start receiving distress calls from a unit in the field that disappeared over six months ago. The only man to return from the unit was badly burned, traumatized, and  claimed that they were attacked, but insisted it was not by the Vietcong.

A rescue team is sent to R-Point, where the unit was last seen.  As they make their way through the landscape, they must deal with enemy firepower, a lake which is now a burial ground, strange visitors, and the possibility that the land is haunted and they may never return home.

While there is some suspense, it is easy to get the characters confused as they are mainly seen in a group and most of the guys do not have any background or character development.