"Elements of the Art and Science of War, or a Course of Instruction in Strategy, Fortification, Tactics of Battle, &c.; Comprising the Duties of Staff, Infantry, Cavalry, Artillery, and Engineers; Adapted for the Use of Volunteers and Militia; Third Edition, by H.W. (Henry Wager) Halleck .This book deals in detail with the main aspects of military strategy and tactics, describing the strategic techniques, the methods of building defensive structures, the tactics of combat operations and the areas of responsibility of the various military units. which is a useful tool for a wide range of readers, especially those with an interest in military affairs and the theory of warfare."