In the aftermath of the Japanese attack on Pearl Harbor, Marine Sgt. John Basilone prepares to ship out; budding journalist Robert Leckie enlists in the Marine Corps; Sidney Phillips leaves for boot camp; the 1st Marine Division lands on Guadalcanal.
Basilone and the 7th Marines arrive on Guadalcanal to reinforce the 1st Marine Division as they defend a crucial airstrip; Basilone suffers a personal loss; the exhausted members of the 1st Marine Division are evacuated.
After the four-month ordeal on Guadalcanal, Leckie, Basilone and thousands of their comrades land in Melbourne; Leckie becomes involved with an Australian woman; Basilone is asked to return home to help sell U.S. war bonds.
Sledge trains for combat at Camp Elliott; Leckie is hospitalized after displaying physical and mental effects of combat.
Basilone's celebrity grows on the war bonds tour; Sledge gets his first taste of combat; the 1st Marine Division meets Japanese resistance.
The Marines attempt to capture the Peleliu airfield; Leckie is evacuated from the island; Sledge learns what is required to fight another day.
James Badge Dale
Robert Leckie
Joseph Mazzello
Eugene Sledge
Jon Seda
John Basilone
Rami Malek
PFC Merriell 'Snafu' Shelton
Sebastian Bertoli
Marine