The outbreak of World War II set in motion a massive expansion of the United States Marine Corps, leading to a 24-fold increase in size by August 1945. This book is the first of several volumes to examine the Corps's meteoric wartime expansion and the evolution of its units. It covers the immediate pre-war period, the rush to deploy defense forces in the war's early months, and the Marines' first combat operations on Guadalcanal, New Georgia, and Bougainville. It focuses on the 1st, 2d, and 3d Marine Divisions (MarDivs) and the provisional 1st, 2d, and 3d Marine Brigades (MarBdes).

By January 1944 the US Marine Corps had grown to a total of 405,169 personnel, comprising 28,193 officers, 10,723 officer candidates, and 366,353 enlisted men. The Fleet Marine Force now had two amphibious corps, four divisions, a separate infantry regiment, 19 defense battalions, and numerous support and service units. Following on from Battle Orders 1: USMC in the Pacific Theater of Operations 1941–43, this book examines the continuing development of the Corps's organization, its training, tactics, weaponry, and command structure, as well as the battles fought in the Southwest Pacific on New Britain, and in the Central Pacific on Tarawa, Roi-Namur, Eniwetok, Saipan, and Tinian. The organization of the 4th Marine Division (MarDiv) and III and V Amphibious Corps (IIIAC, VAC) is also discussed along with smaller, new units.

The US armed forces were responsible for many tactical innovations during the years 1941–45, but in no field was US mastery more complete than amphibious warfare. In the vast, almost empty battlefield of the Pacific the US Navy and Marine Corps were obliged to develop every aspect of the amphibious assault landing in painstaking detail, from the design of many new types of vessel, down to the tactics of the rifle platoon hitting the beach, and the logistic system without which they could not have fought their way inland. This fascinating study offers a clear, succinct explanation of every phase of these operations as they evolved during the war years, illustrated with detailed color plates and photographs.

"John C. McManus, one of our most highly-acclaimed historians of World War II, takes readers from Pearl Harbor--a rude awakening for a ragtag militia woefully unprepared for war--to Makin, a sliver of coral reef where the Army was tested against the increasingly-desperate Japanese. In between were nearly two years of punishing combat as the Army transformed, at times unsteadily, from an undertrained garrison force into an unstoppable juggernaut, and America evolved from an inward-looking nation into a global superpower."--Provided by publisher.

Employing a range of archive black and white photographs, this book examines the US Marine Corps' organisation and command structure, strategy, tactics and amphibious assault doctrine. Providing biographies of its most influential figures, it also surveys insignia, uniforms and equipment to provide a portrait of the US Marine Corps at war.

The outbreak of World War II set in motion a massive expansion of the United States Marine Corps, leading to a 24-fold increase in size by August 1945. This book is the first of several volumes to examine the Corps's meteoric wartime expansion and the evolution of its units. It covers the immediate pre-war period, the rush to deploy defense forces in the war's early months, and the Marines' first combat operations on Guadalcanal, New Georgia, and Bougainville. It focuses on the 1st, 2d, and 3d Marine Divisions (MarDivs) and the provisional 1st, 2d, and 3d Marine Brigades (MarBdes).

The outbreak of World War II set in motion a massive expansion of the United States Marine Corps, leading to a 24-fold increase in size by August 1945. This book is the first of several volumes to examine the Corps's meteoric wartime expansion and the evolution of its units. It covers the immediate pre-war period, the rush to deploy defense forces in the war's early months, and the Marines' first combat operations on Guadalcanal, New Georgia, and Bougainville. It focuses on the 1st, 2d, and 3d Marine Divisions (MarDivs) and the provisional 1st, 2d, and 3d Marine Brigades (MarBdes).