Spots 
War is a matter of vital importance to the state, demanding evaluation through five fundamental factors: moral influence, weather, terrain, leadership, and doctrine. Comparing these factors between opponents reveals the outcome before troops ever move. All warfare relies on deception, feigning weakness when strong and incapacity when prepared. Strike where the enemy is unprepared and appear where least expected.
Maintaining a hundred thousand troops in the field imposes ruinous costs on the domestic economy, depleting stores and impoverishing citizens. No nation benefits from a protracted war. Wise commanders prioritize swift decisions and feed off the enemy, capturing supplies rather than transporting them over vast distances. Victory must be achieved quickly to preserve both army and state wealth.
Preserving an enemy's country intact is superior to destroying it, just as capturing an entire army beats annihilating it. The highest form of generalship disrupts the enemy's plans; next is disrupting alliances; only then comes attacking the army in the field. Besieging fortified cities is a desperate last resort that wastes months and troops. Knowing both oneself and the opponent guarantees victory in every battle.
Securing oneself against defeat relies on defensive positioning, whereas victory depends on the opponent making a mistake. An invincible defense ensures survival, but winning requires exploiting an opening provided by the enemy. Accomplished commanders position themselves where defeat is impossible and do not miss the moment to overcome a flawed foe. Victory in battle comes without glorious reputation when achieved easily through foresight.
Managing a large force follows the same principles as managing a small one, relying on clear organization and signals. Combat relies on combining direct engagement to hold the enemy and indirect tactics to secure victory. Momentum in battle resembles the force of a rolling boulder released from a mountain crest. When dynamic force is managed correctly, even small forces strike with devastating impact.
Whoever occupies the battlefield first and awaits the enemy arrives rested, while whoever arrives late must rush into combat exhausted. Mastery of conflict requires dictating the enemy's movements, luring them with bait or blocking their advance. Attack points where the enemy cannot defend, and defend places the enemy cannot attack. Water adapts its shape to the earth beneath it; an army achieves victory by adapting to the enemy's posture.
Armed conflict carries severe hazards because converting a roundabout path into a direct route requires deceiving the enemy with enticements. An army moving too fast leaves its heavy equipment behind and suffers exhaustion before arrival. Success in maneuvering depends on speed, cohesion, and managing the soldiers' spirit and stamina. Avoid an enemy whose morale is high and strike when their enthusiasm wanes and troops yearn for home.
Success in war requires flexibility and adapting orders to circumstances on the ground. A general must recognize which roads not to follow, which armies not to attack, and which commands from the sovereign not to obey. Balanced leadership avoids five dangerous flaws: recklessness leading to destruction, cowardice leading to capture, quick temper provoked by insults, excessive delicacy vulnerable to shame, and over-solicitude for troops.
Moving forces across diverse terrain requires distinct precautions for mountains, rivers, marshes, and plains. Environmental signs reveal the enemy's hidden actions: rising dust indicates approaching chariots, flying birds mark an ambush, and startled beasts show a surprise attack. When enemy envoys speak humbly while preparations increase, they intend to advance. A general who ignores environmental signals and underestimates the enemy will inevitably be captured.
Ground conditions fall into six distinct categories: accessible, entangling, precipitous, narrow, steep, and distant. Knowing how to deploy across each ground type prevents defeat from structural failures such as flight, insubordination, or collapse. While terrain is the general's greatest aid, calculating distances and controlling key passes determine success. A commander who understands both the enemy and terrain achieves complete victory.
Warfare progresses through nine grounds, ranging from dispersive ground in home territory to lethal ground where survival demands desperate fighting. On dispersive ground, keep the army unified; on lethal ground, press troops into action where no exit exists. Soldiers fight with supreme courage when they realize no escape remains. Speed is the essence of war, taking advantage of the enemy's unreadiness and traveling unmonitored routes.
Five methods exist for attacking with fire: burning soldiers, supplies, baggage trains, arsenals, and formations. Fire serves as an instrument of disruption, requiring dry weather and favorable wind to succeed. Raising fire must be matched by immediate tactical exploitation, never setting fires without following through with conventional force. Enlightened rulers do not initiate war out of anger, nor do generals battle out of resentment.
Foreknowledge cannot be gained from spirits or deductive reasoning; it comes only from men who know the enemy's situation. Five types of spies exist: local, internal, double, doomed, and surviving. Managing secret agents requires supreme subtlety, generosity, and discernment, as no army operations are more confidential. A wise ruler and brilliant general use the highest intelligence for espionage to achieve greatness.
A strategic guide to conflict, victory, and survival through calculation, deception, and adaptability.