火攻
Art of War Chapter 12: The Attack by Fire — 火攻 Explained
Sun Tzu's five types of fire attack, the conditions for success, and the timeless warning against letting anger dictate strategic decisions
Burning men · Burning supplies · Burning equipment · Burning arsenals · Fire as signal
Published July 17, 2026 · 8 min read · By Oriens
Sun Tzu's Art of War Chapter 12 (火攻 / Huǒ Gōng) — five types of fire attack, the conditions for success, and the timeless warning against acting out of anger.
Key Takeaways- What are the five types of fire attack in Sun Tzu's Art of War: Sun Tzu lists five ways to use fire offensively: (1) burning men — setting fire to enemy soldiers in their camps; (2) burning supplies — destroying food, fodder, and provisions; (3) burning equipment — targeting wagons, weapons, and transport; (4) burning arsenals — destroying armories and depots; and (5) using fire as a signal — dropping incendiary devices from above to communicate or create chaos. Each type serves a different strategic purpose and must be employed according to the situation.
- What conditions does Sun Tzu say are necessary for mounting a fire attack: Sun Tzu specifies five conditions: the weather must be dry; the timing must align with the moon's position in certain constellations associated with rising winds (he names the Sieve, the Wall, the Wings, and the Crossbar); combustible materials must be prepared in advance; the wind direction must be favorable (do not attack upwind); and troops must be positioned to exploit the chaos that fire creates. Without all five conditions in place, a fire attack is unlikely to succeed.
- What does Sun Tzu mean by 'a ruler should not mobilize his army out of anger': This is Sun Tzu's most famous philosophical statement on the psychology of command.
Contents
Why Chapter 12 Matters
Chapter 12, Attack by Fire (火攻 / Huǒ Gōng), is the shortest chapter in The Art of War, yet it contains some of the most intense tactical instruction in the entire text — and, remarkably, the most powerful philosophical warning. It opens with fire as a weapon of devastating force and closes with a sobering meditation on when war should not be fought at all.
This combination is not accidental. Sun Tzu devotes the first half of the chapter to the technical mastery of a terrifying weapon. He then pivots to the more difficult mastery: the control of the commander's own emotions. The message is unmistakable — tactical power without emotional discipline is not strategy; it is danger.
The chapter can be read as a hinge in the structure of The Art of War. The first eleven chapters build a comprehensive system of strategy, terrain, maneuvering, and adaptability. Chapter 12 introduces a specific, devastating tool — and immediately asks: who should wield this, and when?
"The enlightened ruler is cautious, and the good general is alert. This is the way to keep the state secure and the army intact."
— Sun Tzu, The Art of War, Chapter 12, Attack by Fire (trans. Samuel B. Griffith)
The Five Types of Fire Attack
Sun Tzu begins by categorizing five distinct ways to use fire as a military weapon. Each targets a different strategic vulnerability and serves a different purpose on the battlefield:
1. Burning Men
Setting fire to enemy soldiers in their camps or positions. The goal is not merely to kill but to create panic and disorder — to turn a fortified encampment into chaos that can be exploited by a prepared force. Sun Tzu notes that fire in a camp causes soldiers to break formation and flee, making them vulnerable to disciplined attack.
2. Burning Supplies
Destroying the enemy's stores of food, fodder, and provisions. An army without supplies cannot sustain itself, regardless of its fighting strength. This is a strategic attack on the enemy's ability to remain in the field. Sun Tzu values this highly because it achieves victory without direct engagement — the weakened army must withdraw or starve.
3. Burning Equipment
Targeting wagons, weapons, siege machinery, and transport animals. This disrupts the enemy's operational capacity and mobility. Without equipment, even a well-fed army cannot fight effectively or maneuver. The destruction of equipment creates a strategic advantage that persists beyond a single battle.
4. Burning Arsenals
Destroying armories, depots, and magazines. This is the deepest form of logistical attack — striking the enemy's reserves, not just what is currently in use. An army that loses its arsenal loses its ability to replace losses, resupply, or sustain a prolonged campaign. It is the equivalent of destroying a modern military's supply chain.
5. Using Fire as a Signal
Dropping incendiary devices from above or using fire to communicate between units. This use of fire is more tactical than logistical — it creates signals, triggers pre-planned maneuvers, and coordinates attacks across dispersed forces. Sun Tzu treats it as a distinct category because its purpose is not destruction but coordination and psychological impact.
"There are five ways of attacking with fire. The first is to burn soldiers in their camp; the second is to burn supplies; the third is to burn equipment; the fourth is to burn arsenals; the fifth is to drop fire from above."— Sun Tzu, The Art of War, Chapter 12
The Conditions for Fire
Sun Tzu was no mere technician — he understood that even the most powerful weapon is useless if employed at the wrong time or in the wrong conditions. He specifies five conditions that must be met before a fire attack can succeed:
Weather
The weather must be dry. Fire attacks launched during wet or humid conditions fail because the materials will not ignite properly. Sun Tzu advises commanders to wait for periods of drought or extended dryness. The environment must cooperate with the weapon.
Timing and Celestial Signs
Sun Tzu connects the timing of fire attacks to the movement of the moon and stars. He specifies that fire should be launched when the moon is in certain constellations — the Sieve, the Wall, the Wings, and the Crossbar — because these are associated with rising winds. This is not superstition: it is early empirical meteorology, linking celestial observation to weather patterns.
Materials
Combustible materials and kindling must be prepared and positioned in advance. A fire attack cannot be improvised — it requires advance preparation, stockpiling of incendiary materials, and placement in locations that will maximize the spread of fire toward the enemy.
Wind Direction
Sun Tzu gives a practical and emphatic warning: do not attack upwind. Fire driven by wind against your own position is catastrophic. The commander must read the wind — both its strength and its direction — and time the attack so that the fire spreads toward the enemy, not back upon the attacker.
Readiness
Troops must be positioned and ready to exploit the chaos that fire creates. Fire alone does not win battles — it creates the conditions for victory. If the attacking force is not ready to move the moment the fire takes hold, the opportunity is lost. Sun Tzu insists that the commander must have troops in place before the fire is lit.
"To attack with fire, one must depend on the seasons. The season for fire attacks is when the weather is very dry. The days for raising fires are when the moon is in the Sieve, the Wall, the Wings, or the Crossbar — for these are days of rising wind."— Sun Tzu, The Art of War, Chapter 12
The Danger of Anger in Command
The heart of Chapter 12 — and one of the most quoted passages in all of The Art of War — is Sun Tzu's warning about the emotional psychology of command. It comes at the end of the chapter, after the technical discussion of fire, and it shifts the register entirely from tactics to philosophy:
"Therefore a ruler should not mobilize his army out of anger, nor a general go to war out of resentment. Act when it is advantageous to do so. Cease when it is not."— Sun Tzu, The Art of War, Chapter 12
This is not a casual remark. Sun Tzu places this warning at the climax of a chapter about one of the most destructive weapons available to ancient commanders. The implication is deliberate: the more destructive the weapon, the greater the need for emotional discipline in the one who wields it.
The warning operates on two levels. First, it is practical: anger clouds judgment. A commander who acts from resentment will misread the situation, overestimate their strength, and ignore unfavorable conditions. They will launch attacks that calculation would forbid. Second, it is moral: the decision to go to war belongs to the state, not to the ruler's feelings. War is too consequential to be a vehicle for personal emotion.
Sun Tzu continues with an observation that strips away any excuse for emotional action: "Anger can revert to joy, and resentment can revert to satisfaction. But a state that has perished cannot be restored, nor can the dead be brought back to life." The emotion will pass — but the consequences of acting on it may be irreversible.
"Therefore a ruler should not mobilize his army out of anger, nor a general go to war out of resentment. Act when it is advantageous to do so. Cease when it is not. Anger can revert to joy, and resentment to satisfaction. But a state that has perished cannot be restored, nor can the dead be brought back to life."
— Sun Tzu, The Art of War, Chapter 12, Attack by Fire (trans. Samuel B. Griffith)
"Anger can revert to joy, and resentment can revert to satisfaction. But a state that has perished cannot be restored, nor can the dead be brought back to life."— Sun Tzu, The Art of War, Chapter 12
Restraint and Timing
The second half of Chapter 12's philosophical teaching concerns the discipline of not acting. Sun Tzu makes a remarkable statement that echoes through the entire text: "If a campaign does not benefit the state, do not undertake it. If you cannot gain an advantage, do not use the military."
This is the negative corollary to every strategy described in the preceding chapters. All the tactics, formations, maneuvers, and fire attacks are tools — but the greatest strategic wisdom is knowing when not to use them. The commander who can win but chooses not to fight, because the fight does not serve the state, has achieved a higher level of mastery than the commander who wins every battle.
Sun Tzu also offers a brief but revealing comparison between fire and water. Fire is dramatic — it terrifies, it consumes, it creates visible and immediate devastation. But fire depends on fuel and can be extinguished. Water, by contrast, is less spectacular but more enduring. It does not flare up and die down — it flows, it wears down, it shapes the landscape over time.
The lesson is strategic: do not mistake the spectacular for the effective. Fire wins battles; water wins campaigns. The commander who understands this will not be seduced by the dramatic appeal of a fire attack when a sustained, patient approach would better serve the state. Sometimes the most powerful move is the one that does not create fire — because it does not need to.
"Therefore the enlightened ruler deliberates upon his plans, and the good general executes them. If it is not advantageous, do not act. If you cannot gain, do not use the military. If there is no danger, do not fight."— Sun Tzu, The Art of War, Chapter 12
Modern Application
Chapter 12 offers some of the most immediately transferable lessons in The Art of War for modern leaders, managers, and decision-makers:
Crisis Communication
The fire metaphor dominates modern crisis management — a PR crisis "goes viral" like fire spreading through dry grass. Sun Tzu's conditions for fire map directly onto crisis response: assess the weather (public sentiment), read the wind (media direction), prepare materials (talking points and responses), and have your team ready before you act. Attacking upwind — denying, deflecting, or attacking critics when the public mood is against you — makes the fire worse.
Project and Investment Termination
The hardest decision in any organization is killing a failing initiative. Sunk cost, ego, and the emotional investment of the team create exactly the conditions Sun Tzu warns against: continuing a campaign out of resentment at the resources already spent. The warning that "a state that has perished cannot be restored" applies directly — a company that exhausts its resources on a doomed project cannot recover them. Knowing when to stop is a higher strategic skill than knowing how to start.
Conflict De-escalation
Sun Tzu's teaching on anger is the foundational principle of de-escalation. In any high-stakes conflict — legal, diplomatic, organizational, interpersonal — the party that can separate emotional reaction from strategic decision holds the advantage. The ability to say "I will decide when I am calm, not when I am angry" is the practical application of Chapter 12 in daily life.
Dramatic vs Sustained Strategy
The fire-and-water comparison applies directly to modern strategic choices. A product launch, a marketing campaign, a reorganization — these are "fire" moves: dramatic, attention-grabbing, but possibly short-lived. A culture of continuous improvement, patient relationship-building, and steady capability development is the "water" approach: less spectacular but more enduring. The best leaders know when each is appropriate and do not let the appeal of fire distract from the necessity of water.
The Dual Lesson of Chapter 12
Chapter 12 of The Art of War delivers a dual lesson that captures the essence of Sun Tzu's entire system. The first lesson is tactical: master your tools. Understand every weapon available to you — its strengths, its limitations, and the conditions under which it works. Fire is devastating, but only when the weather, timing, materials, wind, and readiness all align. A weapon used at the wrong time is worse than no weapon at all.
The second lesson is psychological: master yourself. The most powerful weapon in the world is useless if the hand that wields it is guided by anger. The commander who cannot control their own emotions will inevitably use their tools at the wrong time, in the wrong way, for the wrong reasons. All the strategic knowledge in the world cannot compensate for a lack of self-mastery.
火攻 is the chapter where Sun Tzu steps back from the details of tactics and looks his reader in the eye. You have learned the tools. Now learn when not to use them. The enemy will give you many reasons to act in anger. The state will give you none to act in wisdom. Choose wisely.
Oriens has mapped 71 philosophical concepts across 330 wisdom cards and 868 conceptual relationships
Further Reading and Sources
For authoritative academic perspectives, consult these external sources:
Sources & Further Reading
- Marcus Aurelius. Meditations. Translated by Gregory Hays. Modern Library, 2002.
- Epictetus. Discourses and Selected Writings. Penguin Classics, 2008.
- Seneca. Letters from a Stoic. Penguin Classics, 1969.
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