The dearth of consolidated studies on the discipline of military geography came to John Collins' attention early in his long and distinguished career as a soldier and scholar. Thus he began and kept up an interest in the subject for more than 40 years, amassing voluminous files on the subject. Finally afforded the opportunity to research and write on his avocation at the National Defense University, he spent 2 years as a Visiting Fellow, tapping not only his own wealth of data and experience but a wide variety of well-informed opinions on every facet of military geography. The resultant volume, the culmination of a life-long career, fills a gap in the professional and technical literature. The National Defense University is pleased to have hosted John Collins and to publish his work. No other book, to our knowledge, marries military art with that of the geographer so deftly and completely. The volume seems destined to meet its stated purposes for years to come, namely, to provide a textbook for students, a handbook for military professionals, and an enlightening survey for any appreciative lay reader.