It's the country that Martin Sheen & his team must illegally enter in search of Col. Kurtz
In fact, Martin Sheen replaced Harvey 
Keitel in the role after Coppola decided Keitel seemed like too active a screen... [DOC] [TLE] Apocalypse Now (1979) - IMDb [PAR] Drama  During the Vietnam War, Captain Willard is sent on a dangerous mission 
into Cambodia ... With Martin Sheen, Marlon Brando, Robert Duvall, Frederic 
Forrest.