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15 sections · 9 key concepts · 5 notable passages
The Art of War
Contents
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▸Preface by Lionel Giles11
Giles surveys the history of Western attempts to translate Sun Tzu, condemning Amiot's 1782 French rendering as little better than an imposture and Calthrop's 1905 English version as excessively bad. He justifies his own 1910 edition on the grounds that Sun Tzu deserved a faithful and scholarly treatment, and describes the editorial apparatus he has supplied: numbered paragraphs, extensive notes from Chinese commentators, and a complete Chinese concordance. He is candid that the work was printed as sheets were completed and lacks a final overall revision.
- Previous translations were plagued by omissions, distortions, and outright fabrications
- Giles cut the text into numbered paragraphs and incorporated centuries of Chinese commentary
- The edition was expressly designed as a scholarly standard, not a popular abridgment
▸Introduction: Sun Wu and His Book15
Giles reconstructs the historical and textual basis for Sun Tzu, drawing on Ssu-ma Ch'ien's biography, which recounts Sun Wu demonstrating military discipline by drilling—and executing—the king's concubines. He weighs scholarly doubts about Sun Wu's historicity, notes the absence of any mention of him in the Tso Chuan, and traces the transmission of the thirteen chapters from the Han dynasty onward. The Introduction also examines the circle of ancient Chinese commentators (Ts'ao Kung, Tu Mu, Chang Yu, and others) whose annotations have shaped every subsequent reading of the text.
- Sun Wu is placed in the late 6th century BC, serving King Ho Lu of Wu
- The historicity of Sun Wu is debated; some scholars argue the text post-dates its supposed author
- Thirteen chapters were already canonical by the time of Ssu-ma Ch'ien
- Rich tradition of Chinese commentary forms an integral part of the scholarly edition
▸I. Laying Plans61
The opening chapter establishes the five constant factors that govern all military operations—Moral Law, Heaven, Earth, Commander, and Method and Discipline—and the seven comparative questions a strategist must answer to forecast victory or defeat. Sun Tzu insists that all warfare is fundamentally based on deception: appear unable when able, inactive when active, near when far, far when near. The chapter closes with the principle that many calculations made in the planning stage lead to victory, while few calculations lead to defeat.
- Five constant factors: Moral Law, Heaven, Earth, Commander, Method and Discipline
- Seven comparative questions for assessing relative strength before battle
- All warfare is based on deception—concealment of true capability and intention
- Careful pre-battle calculation is the foundation of victory
▸II. Waging War67
This chapter addresses the economics of war, arguing that prolonged campaigns drain the treasury, exhaust the army, and invite opportunistic attacks from rivals. Sun Tzu's remedy is rapidity: win quickly, forage on the enemy rather than depending on distant supply lines, and treat captured soldiers well in order to augment your own strength. The chapter ends with the reminder that the general of armies is the arbiter of the nation's fate in peace or peril.
- Prolonged warfare is catastrophic regardless of outcome—swift victory is the goal
- Forage on the enemy to sustain your army and reduce the burden on the home state
- Treat captured enemy soldiers with kindness and incorporate them
- The general's competence or incompetence determines national security
▸III. Attack by Stratagem73
Sun Tzu presents the hierarchy of strategic excellence: the highest form of generalship is to foil the enemy's plans; next is to prevent the junction of his forces; next is to attack him in the field; worst of all is to besiege walled cities. He enumerates five conditions for victory and delivers the treatise's most famous aphorism: if you know the enemy and know yourself, you need not fear a hundred battles. The chapter also identifies three ways a ruler can harm his own army through ignorant interference with military command.
- Supreme excellence is breaking the enemy's resistance without fighting
- Hierarchy of strategy: disrupt plans, isolate forces, attack in field, siege as last resort
- Five essentials for victory, including knowing when to fight and when not to
- Know the enemy and know yourself—the foundation of strategic certainty
▸IV. Tactical Dispositions81
The chapter argues that securing oneself against defeat lies entirely within one's own control, while the opportunity to defeat the enemy is provided by the enemy himself. A skilled fighter first makes himself invincible, then waits for the enemy's vulnerable moment. True excellence in this view is invisible: the consummate strategist wins without creating opportunities for spectacle or applause, because he conquers an enemy already positioned to lose. The chapter closes with a five-step sequence from measurement through estimation, calculation, and balance of chances to victory.
- Defense lies in one's own hands; offense requires an opening the enemy provides
- The invincible fighter wins by making no mistakes and preemptively controlling position
- Real excellence appears effortless because victory was secured before fighting began
- Military method: Measurement → Estimation → Calculation → Balance of chances → Victory
▸V. Energy87
Chapter V introduces the crucial distinction between direct (cheng) and indirect (ch'i) methods, which in combination are inexhaustible as the elements and the seasons. Sun Tzu uses vivid analogies—musical notes, primary colors, cardinal tastes—to show that a small number of basic principles can generate infinite tactical variety. The good fighter marshals collective energy like a round stone rolled down a mountain: irresistible momentum generated not by individual effort but by correct positioning and timing.
- Direct and indirect methods combine to produce an infinite variety of maneuvers
- Energy (ch'i) is like a crossbow's stored force; decision is the release of the trigger
- Simulated disorder requires perfect internal discipline to execute safely
- The clever combatant uses combined energy rather than demanding too much from individuals
▸VI. Weak Points and Strong95
The chapter develops the principle of attacking where the enemy is weak while avoiding his strength. By remaining invisible and concentrating against dispersed opponents, the skillful general achieves local numerical superiority regardless of overall troop numbers. Military tactics are compared to water, which flows around high ground and seeks the low: just as water has no constant shape, warfare has no constant conditions, and the ability to modify tactics in relation to the opponent is the mark of a heaven-born captain.
- Impose your will on the enemy; do not allow his will to be imposed on you
- Concentrate your forces while compelling the enemy to disperse his
- Attack where undefended; the skillful attacker ensures the enemy does not know what to defend
- Tactics are like water—no constant shape, always adapting to the ground
▸VII. Maneuvering105
Maneuvering is described as the most difficult element of war, because it consists in turning the devious into the direct and misfortune into gain. Sun Tzu warns against excessively rapid forced marches that exhaust troops and destroy unit cohesion. The chapter gives the famous formula for the qualities of movement—swift as the wind, compact as the forest, devastating as fire, immovable as a mountain. The appendix from the Book of Army Management covers signaling, the management of morale, and the principles of avoiding enemies at the peak of their spirit while striking when their ardor has waned.
- True maneuver converts disadvantage to advantage by outpacing the enemy's calculations
- Forced marches beyond reasonable distance shatter the force they are meant to employ
- Rapidity of wind, compactness of forest, ferocity of fire, immobility of mountain
- Attack the enemy's spirit: avoid keen troops, strike when morale is sluggish
▸VIII. Variation in Tactics117
This brief chapter insists that mastery of tactical variation—knowing which roads not to follow, which armies not to attack, which towns not to besiege, and even which sovereign commands not to obey—distinguishes the great general from the merely competent one. Sun Tzu enumerates five dangerous faults in a general: recklessness, cowardice, a quick temper, excessive sensitivity to honor, and over-solicitude for his men. He warns that when an army is overthrown and its leader killed, the cause will invariably be found in one of these five flaws.
- Tactical wisdom includes knowing when not to act, not just when to act
- Five dangerous faults of generalship: recklessness, cowardice, quick temper, sensitivity to shame, over-solicitude for troops
- Do not rely on the enemy not coming; rely on being ready to receive him
- Blend advantage and disadvantage in all planning
▸IX. The Army on the March125
The chapter is a field manual for reading terrain and interpreting signs of the enemy. Sun Tzu prescribes specific behavior for mountain, river, salt-marsh, and flat terrain, emphasizing high ground, sunshine, and proximity to water. The bulk of the chapter is devoted to reading the enemy: the behavior of birds, dust clouds, movements of grass and trees, the conduct of emissaries, and the sounds of an encampment all reveal dispositions, morale, and intentions. The chapter closes with advice on discipline: soldiers must be trained before being asked to fight, or they will be neither obedient nor useful.
- Occupy high, sunny ground near water; avoid fighting uphill or against the current
- Nature itself reveals the enemy—birds, dust, vegetation, and envoy demeanor are all intelligence
- Treat soldiers humanely but enforce discipline consistently; humanity without authority produces spoiled troops
- Do not repeat an attack the enemy has successfully repulsed
▸X. Terrain140
Sun Tzu classifies terrain into six types—accessible, entangling, temporizing, narrow passes, precipitous heights, and distant ground—and prescribes tactical conduct for each. He then identifies six calamities that arise not from natural conditions but from a general's failures: flight, insubordination, collapse, ruin, disorganization, and rout. The second half of the chapter is among the most humanistic passages in the treatise, stressing that the general who regards his soldiers as his children earns the kind of devotion that transforms an army into an irresistible force.
- Six terrain types require different approaches; knowledge of terrain is a strategic obligation
- Six military calamities all trace back to faults of command, not of the army
- Regard your soldiers as your own children—they will follow you to death
- A general must fight when necessary even against sovereign orders if the state's safety demands it
▸XI. The Nine Situations150
The longest chapter in the treatise classifies ground according to the psychological and logistical situation of the invader: dispersive, facile, contentious, open, intersecting highways, serious, difficult, hemmed-in, and desperate. For each, Sun Tzu prescribes matching conduct. The central insight is that soldiers fight best when they have no alternative—on desperate ground, with retreat cut off, every man becomes a hero. The chapter includes the celebrated principle of burning boats to remove the option of retreat, and an extended analysis of how to unify the army's spirit so it acts as a single organism.
- Nine situational ground types dictate nine distinct tactical responses
- Soldiers placed in desperate ground fight with the courage of necessity
- Remove the possibility of retreat to consolidate fighting spirit
- The skilled general herds his troops like a serpent—head and tail responding to each other
▸XII. The Attack by Fire180
After cataloguing five targets for fire attack (soldiers, stores, baggage-trains, arsenals, and incendiary projectiles) and five tactical responses to fire, the chapter pivots to a broader moral argument: war must never be waged to gratify a ruler's anger or a general's pique. Anger can give way to gladness, but a destroyed kingdom cannot be restored and the dead cannot return to life. The enlightened ruler plans far ahead and the good general cultivates his resources; neither moves unless there is genuine advantage to be gained.
- Five modes of fire attack, each requiring specific preparation and follow-through
- Fire is a force multiplier when combined with a conventional assault at the right moment
- Never enter battle driven by emotion; anger passes but the dead do not return
- Only move when there is genuine advantage—do not fight out of ego or spite
▸XIII. The Use of Spies188
The concluding chapter argues that intelligence is the decisive element in war: refusing to fund spies while spending enormous sums on the army itself is the height of inhumanity because it prolongs suffering unnecessarily. Sun Tzu enumerates five classes of spy—local, inward, converted, doomed, and surviving—and places the converted spy at the center of the network, since he alone can validate and direct the others. The chapter closes by insisting that the use of superior intelligence through spies is what distinguishes the enlightened ruler and the wise general from all others.
- Five classes of spy; the converted spy is the cornerstone of the whole intelligence system
- Foreknowledge cannot come from spirits, analogy, or calculation—only from human agents
- Spies must be treated with the utmost liberality and secrecy
- An army's ability to move depends entirely on its intelligence of the enemy
Overview
The Art of War is the oldest extant military treatise in the world, composed in China during the late Spring and Autumn period (approximately the late 6th century BC) and traditionally attributed to Sun Wu, a general who served the King of Wu. The work consists of thirteen tightly argued chapters addressing distinct dimensions of armed conflict—from strategic planning and the economics of campaigning to battlefield maneuver, terrain analysis, and the use of spies. Lionel Giles, assistant in the Department of Oriental Printed Books and Manuscripts at the British Museum, produced the standard English scholarly edition in 1910, supplying a faithful translation together with extensive notes drawn from Chinese military commentators spanning more than a millennium.
What distinguishes the treatise from later Western military writing is its systematic preference for economy and intelligence over brute force. Sun Tzu argues that the supreme commander does not win by out-fighting the enemy but by out-thinking him: disrupting his plans before they mature, separating his forces, exploiting weak points, and winning the psychological contest before the physical one is joined. 'Supreme excellence consists in breaking the enemy's resistance without fighting.' These principles emerge from a Taoist-influenced worldview in which harmony, adaptability, timing, and deception are the fundamental variables of success.
The book's endurance across twenty-five centuries—and its adoption by strategists, executives, athletes, and diplomats—testifies to its transcendence of any single domain. Its core insight, that conflict is a contest of knowledge, will, and positioning rather than of numbers or weapons, applies wherever scarce resources are deployed against an adversary under uncertainty. The text continues to be studied in staff colleges, business schools, and boardrooms precisely because its structural arguments about preparation, adaptability, and foreknowledge resist obsolescence.
Victory belongs not to the strongest but to the most knowing: the commander who masters foreknowledge of terrain, enemy, and self creates the conditions for victory before battle begins, so that striking merely confirms what preparation has already decided. Prolonged conflict is catastrophic regardless of outcome, making swift decision the hallmark of true mastery. And because no tactic can be repeated unchanged, adaptability—responding to infinite variety with infinite variation—is the supreme and enduring military virtue the entire treatise labors to instill.
Key Concepts
The Five Constant Factors (Moral Law, Heaven, Earth, Commander, Method and Discipline) p.61
The five interdependent variables that determine the outcome of any military contest: Moral Law is the harmony between ruler and ruled that makes men willing to die for a cause; Heaven signifies climate and timing; Earth covers terrain and distances; Commander denotes the virtues of wisdom, sincerity, benevolence, courage, and strictness; and Method and Discipline governs organization, supply, and expenditure.
Deception as the basis of warfare p.65
Sun Tzu's foundational axiom that all successful military action depends on misleading the enemy about one's true strength, location, intention, and capability—appearing unable when able, inactive when active, near when far—so that the enemy's responses are always addressed to a false picture of reality.
Cheng and Ch'i (direct and indirect methods) p.87
The two fundamental modes of military operation: cheng is the direct, expected engagement that fixes the enemy's attention, while ch'i is the indirect, unexpected stroke that delivers the decisive blow; they are mutually defining and interchangeable, generating in combination an inexhaustible variety of tactical options.
Know the enemy and know yourself p.80
The treatise's most celebrated formula for strategic certainty: complete knowledge of one's own forces and of the enemy's dispositions, morale, and plans eliminates the uncertainty that causes defeat, whereas ignorance of either side—and especially of both—guarantees failure regardless of numerical strength.
Winning without fighting (supreme excellence) p.73
The highest form of strategic accomplishment, in which the enemy's resistance is broken through positioning, psychological pressure, and the disruption of his plans before battle is joined—so that victory is achieved without the costs and risks of open combat.
The Nine Situations (nine varieties of ground) p.150
Sun Tzu's classification of the nine types of strategic ground an invading army may occupy—from dispersive ground near home to desperate ground with retreat cut off—each of which generates distinct psychological conditions in the troops and demands a specific tactical and motivational response from the commander.
Five dangerous faults of the general p.122
The five character flaws that reliably destroy commanders and armies: recklessness (leading to destruction), cowardice (leading to capture), a quick temper susceptible to provocation, excessive sensitivity to shame and honor, and over-solicitude for the welfare of troops at the expense of military necessity.
Foreknowledge and the use of spies p.188
Sun Tzu's argument that the decisive information advantage in war can only be obtained through human intelligence—five classes of spy networked around the converted spy—and that refusing to fund this intelligence while spending lavishly on armies is both strategically foolish and morally indefensible.
Adaptability (no constant conditions, no constant tactics) p.103
The principle that military tactics, like water, have no fixed shape but must conform to the ground and the enemy; the general who repeats successful tactics allows the enemy to prepare for them, so true mastery lies in the infinite variation of methods in response to circumstances rather than in adherence to any formula.
Themes
Winning without fightingSelf-knowledge and knowledge of the enemyAdaptability and situational responseDeception and the control of appearancesSwift, decisive action over prolonged campaignsThe general's character and independent judgmentConcentration against dispersalIntelligence and foreknowledge as strategic foundationsEnergy, timing, and the exploitation of momentum
Notable Passages
All warfare is based on deception.
Hence to fight and conquer in all your battles is not supreme excellence; supreme excellence consists in breaking the enemy's resistance without fighting.
If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.
Military tactics are like unto water; for water in its natural course runs away from high places and hastens downwards. So in war, the way is to avoid what is strong and to strike at what is weak.
How to Read This
Read in order once to grasp the architecture, then revisit each chapter alongside Giles's footnotes—the commentators' glosses unlock passages that seem cryptic alone. Apply the text by mapping Sun Tzu's categories onto a live problem: know yourself, know the opponent, assess the terrain, time the strike. Resist extracting aphorisms as standalone maxims; their meaning is precise and contextual. Chapters III, VI, and XIII reward repeated reading as they contain the deepest arguments on indirect action, concentration, and foreknowledge.