Piknik (1967)

A tropical island in the Pacific, the year is 1945. A detachment of five American soldiers slog their way through a jungle overgrown with bamboo and liana vines. They are heading for the island's interior, in search of the enemy, the Japanese soldiers. As the evening draws near, they halt at a clearing surrounded by thick vegetation. The place could be a trap. As they search the surroundings they find a path. Perhaps it's the animals that made it, but it may have been the enemy.