Basilone’s celebrity grows as he travels across the country on the war bonds tour. On Pavuvu, Sledge, assigned to the 5th Marines, 1st Marine Division, is briefly reunited with Phillips and Leckie rejoins his company. Sledge then gets his first taste of combat as he, Leckie, and the rest of the 1st Marine Division meet fierce Japanese resistance while landing on the intricately and heavily defended coral island of Peleliu.

Despite the suffocating 115-degree heat and a lack of clean drinking water, Sledge, Leckie and the other Marines confront the highly-fortified enemy as they attempt to capture the Peleliu airfield. After seeing his comrades badly injured, Leckie himself is wounded and evacuated from the island. Sledge witnesses the shocking truth about what is sometimes required to survive and fight another day.