ART. IV.--Wars with or without Allies. ART. V.--Wars of Intervention. ART. VI.--Wars of Invasion, through a Desire of Conquest or for other Causes. ART. VII.--Wars of Opinion. ART. VIII.--National Wars. ART. IX.--Civil and Religious Wars. ART. X.--Double Wars, and the Danger of Undertaking Two at the Same Time. CHAPTER II. MILITARY POLICY. ART. XI.--Military Statistics and Geography. ART. XII.--Different Causes which have an Influence over the Success of a War. ART. XIII.--The Military Institutions of States. ART. XIV.--The Command of Armies and the Supreme Control of Operations. ART. XV.--The Military Spirit of Nations and the Morale of Armies. CHAPTER III. STRATEGY. Definition of Strategy and Tactics. THE FUNDAMENTAL PRINCIPLE OF WAR. ART. XVI.--The System of Offensive or Defensive Operations. ART. XVII.--The Theater of Operations. ART. XVIII.--Bases of Operations. ART. XIX.--Strategic Lines and Points, Decisive Points of the Theater of War, and Objective Points of Operation. ART. XX.--Fronts of Operations, Strategic Fronts, Lines of Defense, and Strategic Positions. ART. XXI.--Zones and Lines of Operations. ART. XXII.--Strategic Lines of Maneuver. ART. XXIII.--Means of Protecting Lines of Operations by Temporary Bases or Strategic Reserves. ART. XXIV.--The Old and New Systems of War. ART. XXV.--Depots of Supply, and their Relations to Operations. ART. XXVI.--Frontiers, and their Defense by Forts and Intrenched Lines.--Wars of Sieges. ART. XXVII.--Intrenched Camps and Têtes de Ponts in their Relation to Strategy. ART. XXVIII.--Strategic Operations in Mountainous Countries. ART. XXIX.--Grand Invasions and Distant Expeditions. Epitome of Strategy. CHAPTER IV. GRAND TACTICS AND BATTLES. ART. XXX.--Positions and Defensive Battles. ART. XXXI.--Offensive Battles and Orders of Battle. ART. XXXII.--Turning Maneuvers, and Too Extended Movements in Battle. ART. XXXIII.--Unexpected Meeting of Two Armies on the March. ART. XXXIV.--Surprises of Armies. ART. XXXV.--Attack of Cities, Intrenched Camps or Lines, and Coups de Main generally. CHAPTER V. SEVERAL OPERATIONS OF A MIXED CHARACTER, WHICH ARE PARTLY IN THE DOMAIN OF STRATEGY AND PARTLY OF TACTICS. ART. XXXVI.--Diversions and Great Detachments. ART. XXXVII.--Passage of Rivers and other Streams. ART. XXXVIII.--Retreats and Pursuits. ART. XXXIX.--Cantonments and Winter Quarters. ART. XL.--Descents, or Maritime Expeditions. CHAPTER VI. LOGISTICS, OR THE PRACTICAL ART OF MOVING ARMIES. ART. XLI.--A few Remarks on Logistics in general. ART. XLII.--Reconnoissances, and other Means of Gaining Accurate Information of the Enemy's Movements. CHAPTER VII. FORMATION AND EMPLOYMENT OF TROOPS FOR BATTLE. ART. ART. XLIII--Posting Troops in Line of Battle.