The ferocity of the Pacific war almost defied the available military technology. In this environment the evolving use of tanks by the US Marine Corps played a significant role; at the end of the Battle of Okinawa, Major General Lemuel Shepherd wrote in his report that ‘if any one supporting arm can be singled out as having contributed more than any others during the progress of the campaign, the tank would certainly be selected.’ This book traces the history of the US Marine Corps tank crewman, including the significant changes in doctrine, equipment, and organization that the war brought, and his experience fighting in the Pacific theater.