Company K’s mortar section leader on Okinawa is a young man who has recently graduated from an Ivy League college and officer training. Although Sledge recognizes this as evidence of Mac’s intelligence, Mac ultimately proves arrogant and incompetent in actual combat. Behaving with no apparent understanding of the life-and-death gravity of war, he often puts his own fighters in danger through his own mistakes and reckless deeds. In addition, he takes part in disgusting acts of gratuitous cruelty, as he insists on peeing in the mouth of any dead Japanese soldier he encounters—which strikes Sledge as the most revolting action he ever sees a Marine perform during the war. Because of Mac’s behavior, the men in Company K despise him and feel ashamed to have them as a leader, as they believe that he does not represent the dignified attitude of the Marine Corps.