R-Point
알포인트 (original)
On 07 January 1972, the South Korean base in Nah-Trang, Vietnam, receives a radio transmission from a missing platoon presumed dead.
Starring Kam Woo-sung, Son Byung-ho, Park Won-sang, Oh Tae-kyung, Lee Sun-kyun, Son Jin-ho, Mun Yeong-dong, Jung Kyung-ho, Kim Byung-chul, Ki Joo-bong
Watch "R-Point" from streaming services Hoopla, Kanopy released in 2004. It's a drama and horror movie, and has a rating of 6.2 out of 10 from Imdb which is usually fine for this kind of movie.