LS PAN across valley and mountains in Korea where Chinese positions are hidden. Shots of men of night patrol testing their weapons, firing rifles into hillside to test accuracy and jamming. Shots of pioneer platoon preparing dynamite charges they will take on night patrol. Shot of dynamite sticks being placed in wooden box, box being fused. CUs of men's faces as they work. Shots of night patrol getting ready to leave dugout with dynamite charges on their backs, of men applying black mud to camouflage their faces.