This document provides an overview of the United States Marine Corps, including its organization, capabilities, and programs. It begins with messages from the Commandant of the Marine Corps and the Foreword that emphasize the Corps' role as America's Expeditionary Force in Readiness and its focus on maintaining operational advantage. The bulk of the document then details the Marine Corps' organization, from the Marine Air Ground Task Force (MAGTF) concept down to its subordinate units. It also provides information on numerous programs related to manpower, education, readiness, equipment, training, fire support, and command/control. The goal is to help readers better understand the Corps, its capabilities, and plans for the future.