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.

"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.

This book examines the wide variety of airborne units that served in the Pacific Theater. Among the units covered are the 12,000-strong 11th Airborne Division; the elite 1st Special Service Force; the 503rd Parachute Infantry Regiment (Separate); and the 1st Marine Parachute Regiment. The nature of the enemy and the terrain in the PTO, and long distances that had to be covered, provided significant and diverse challenges to both Army and Marine Corps parachute units. Internal organization, weapons and equipment, command and control, training, combat missions, and combat operations including the 11th Division's fighting in the Philippines, and the 503rd PIR's legendary jump onto Corregidor and recapture of the island are all covered.

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).