The series is a companion piece to the 2001 miniseries Band of Brothers and focuses on the United States Marine Corps's actions in the Pacific Theater of Operations within the wider Pacific War. Whereas Band of Brothers followed the men of Easy Company of the 506th Parachute Infantry Regiment through the European Theater, The Pacific centers on the experiences of three Marines (Robert Leckie, Eugene Sledge, and John Basilone) who were in different regiments (1st, 5th, and 7th, respectively) of the 1st Marine Division.