Ask for a movie name

Rolling in the mud, is it a "floating life in the battlefield"? I saw it around junior high school. Two American soldiers and a woman were walking in the jungle. One of them raped the woman when it rained and rolled in the mud. I remember another time, soldiers and women were locked in a dungeon, and they made love underwater through a gap in a wooden cage. The penis I saw at that time was always uncomfortable, so I remembered it deeply. As for the film requested by the landlord, I have no impression.