From the Publisher: This latest edition of an official U.S. Government military history classic provides an authoritative historical survey of the organization and accomplishments of the United States Army. This scholarly yet readable book is designed to inculcate an awareness of our nation's military past and to demonstrate that the study of military history is an essential ingredient in leadership development. It is also an essential addition to any personal military history library.

This book looks at several troop categories based on primary function and analyzes the ratio between these categories to develop a general historical ratio. This ratio is called the Tooth-to-Tail Ratio. McGrath's study finds that this ratio, among types of deployed US forces, has steadily declined since World War II, just as the nature of warfare itself has changed. At the same time, the percentage of deployed forces devoted to logistics functions and to base and life support functions have increased, especially with the advent of the large-scale of use of civilian contractors. This work provides a unique analysis of the size and composition of military forces as found in historical patterns. Extensively illustrated with charts, diagrams, and tables. (Originally published by the Combat Studies Institute Press)