At a costume party he attends with his parents, he wanders off and encounters a Japanese airplane that had been shot down, nearby, he finds a camp full of Japanese troops in a trench and is taken aback.
He attends with his parents. This is at a costume party. He wanders off. He encounters a Japanese airplane. This Japanese airplane had been shot down. He finds a camp full of Japanese troops in a trench. This is nearby. He is taken aback. This was nearby.