Robert Leckie and the 1st Marines take part in the Battle of the Tenaru. The Battle of Savo Island is briefly portrayed.
John Basilone and the 7th Marines land on Guadalcanal to bolster the defenses around Henderson Field.
The 1st Marine Division on Guadalcanal is relieved and arrives in Melbourne, Australia.
Sledge enlists in the Marines and trains for combat, while Leckie is put into action at Cape Gloucester.
Sledge is reunited with an old friend, Sidney Phillips. Leckie integrates himself back into the front-line lifestyle.
The Marines move to capture Peleliu's airfield. Leckie is wounded by a blast concussion while trying to relay a message to the corpsman.
Sledge and the 5th Marines move into Peleliu's Bloody Nose Ridge to face the Japanese.
Basilone is transferred to the 5th Marine Division where he trains Marines for combat.
Sledge lands at Okinawa. Sledge, now a seasoned veteran, becomes more cynical and no longer shows any compassion for the Japanese.
Sledge and Leckie return home after the Japanese surrender.
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