How does William Manchester use imagery in Goodbye, Darkness: A Memoir of the Pacific War?

Examples of Imagery:

"My first shot had missed him, embedding itself in the straw wall, but the second caught him dead-on in the femoral artery. His left thigh blossomed, swiftly turning to mush. A wave of blood gushed from the wound; then another boiled out, sheeting across his legs, pooling on the earthen floor. Mutely he looked down at it. He dipped a hand in it and listlessly smeared his cheek red. His shoulders gave a little spasmodic jerk, as though someone had whacked him on the back; then he emitted a tremendous, raspy fart, slumped down, and died. I kept firing, wasting government property." p. 6

"It was like a grotesque scene from a Durrenmatt play: bodies, severed limbs, and gouts of blood everywhere. The noise of our loudmouthed sober attracted the attention of the battalion surgeon, who came over, wiping his blood hands on his bloody apron. He stared, incredulous. I doubt that he had ever seen waters more troubled than the sergeant major's tears. He asked, 'That's Mike Powers?' I said, 'It was.' He said, 'I thought you'd crack before he did.' I said, 'So did I.'" p. 107