Increasingly frustrated by his role campaigning for war bonds, Basilone convinces the Marines to allow him to train troops headed for combat. Transferred to Camp Pendleton, he enjoys a whirlwind romance with an initially reluctant female Marine, Lena Riggi. But the couple know they are living on borrowed time, as Basilone is soon to take part in the Marine landing on Iwo Jima.

After the Japanese surrender, Leckie, healed from his wounds, leaves the hospital and returns home, while Sledge heads back to Alabama to be reunited with his family and Sid Phillips. Lena visits Basilone's home and has an emotional meeting with his family. Leckie adjusts to post-war life by resuming his old job and starting a new relationship, but for Sledge, unsure why he survived the war seemingly unscathed, adjustment will require more time.