Very simply, this publication describes the philosophy which distinguishes the U.S. Marine Corps. The thoughts contained here are not merely guidance for action in combat but a way of thinking. This publication provides the authoritative basis for how we fight and how we prepare to fight. This book contains no specific techniques or procedures for conduct. Rather, it provides broad guidance in the form of concepts and values. It requires judgment in application. Warfighting is not meant as a reference manual; it is designed to be read from cover to cover. Its four chapters have a natural progression. Chapter 1 describes our understanding of the characteristics, problems, and demands of war. Chapter 2 derives a theory about war from that understanding. This theory in turn provides the foundation for how we prepare for war and how we wage war, chapters 3 and 4, respectively.
The U.S. Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States. In the civilian leadership structure of the United States military, the Marine Corps is a component of the United States Department of the Navy, often working closely with U.S. naval forces for training, transportation, and logistic purposes; however, in the military leadership structure the Marine Corps is a separate branch.