It was the end of the mystery.
3 seconds sound clip from the Platoon movie soundboard.
You can hear this line at 00:44:37 in the Blu-ray version of the movie.
Quote context
[...]
- We had to get to the village before dark.
- So we left Elias with some men to keep looking and to wait for the engineers.
- But it was King who found him, about 1000 yards downriver, not far from the village.
- It was the end of the mystery.
- Barnes was at the eye of our rage. And through him, our Captain Ahab.
- He would set things right again. That day, we loved him.
[...]