9. The Army on the March

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Original Chinese text

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Sun Zi classifies the positioning method against an opponent by terrain. In hills, cut away narrow ridge options, move by valleys, hold higher ground, and avoid climbing steep crags blindly.

In water terrain, stay away from the current; when an enemy crosses, do not meet him in the water, but strike when he is midway across. For riverfront operations, do not let the flow determine your movement; hold higher ground.

In marshy reeds, leave quickly and avoid linger. If both sides meet there, use reed cover and avoid getting sealed by dense trees. On open ground, keep movement easy, use higher support on the flank side, and manage depth between front and rear for resilience.

This is terrain-specific positioning logic. The practical goal is not mere daring but stable mobility with a protected line of recovery.

Original Chinese text

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Armies generally prefer high ground and avoid low, damp ground; choosing sunlit, solid positions keeps troops healthier and less prone to disorder.

In hills and embankments, occupy the sunny side with strong right-side support.

After rain, churning foam indicates unstable water; if crossing is needed, wait until the flow calms.

Health and mobility are part of battlefield engineering. Terrain choices are also choices about disease risk, fatigue, and sustainability.

Original Chinese text

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When terrain shows deep ravines or hidden pitfalls such as sinks, cages, nets, traps, and cracks, leave at once and do not approach.

If we keep distance, the enemy advances; if we advance into a perceived invitation, he may turn and slip behind us.

Any nearby cliffs, wells, reed beds, woods, or dense cover must be checked carefully; these are common ambush locations.

This is a pre-combat security rule. Terrain reconnaissance prevents local hazards from becoming strategic losses.

Original Chinese text

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If the enemy is close yet calm, it often relies on defensive terrain; if it is distant yet repeatedly challenging, it may be inviting advancement. An easy camp position can mean favorable ground for that side.

Moving trees and dense brush, sudden birds, and frightened animals are warning signs. Sharp, high dust often signals mounted or chariot movement, while low and broad dust suggests infantry.

A dispersed, open pattern can resemble work in the area; little passing movement points to camp concentration. Low-tone words with increasing readiness can indicate advance, while loud pressure plus recoil suggests withdrawal. Light units leading from the side suggests formation is being laid; no formal oath but asking for peace can be probing. Running deployment and half-advance half-retreat are timing and lure behaviors.

A staff-supported stand may indicate hunger, taking water first indicates thirst, and seeing gain but not advancing indicates fatigue. Night shouting and disorder suggest fear; moved banners and angry officials suggest weak control and exhaustion.

If supplies are present yet no empty sacks return and no one goes back, the enemy is usually exhausted. Repeated soft acquiescence, frequent rewards, and frequent punishment imply unstable command. A force that displays force then fears its own troops shows poor drilling; repeated apologies indicate a desire to rest.

This is a practical intelligence matrix of signs. The passage converts observable cues into estimates of enemy fatigue, confidence, deception, and readiness.

Original Chinese text

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When armies face each other angrily for a long time, neither merging nor separating, careful observation is required.

Emotional standoff is unstable. The commander should read whether it hides a ruse, hesitation, or a timing maneuver before acting.

Original Chinese text

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The worth of an army is not in glittering weapons; it is enough that it does not rush blindly, can combine force, judge the enemy, and win people to its side.

One who confronts the opponent carelessly, without thought, will be captured.

This continues the restraint doctrine. Military strength is most visible in coordination and clarity of judgment.

Original Chinese text

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If soldiers are punished before they are aligned, they resist, and resistant units are difficult to use. If soldiers are aligned but orders are not enforced, they still cannot be used.

So lead first with civil instruction and then correct with military enforcement; this is how command is secured. Consistent routine guidance teaches people to comply, while empty orders without execution do not.

This is the sequence of governance: legitimacy, consistency, then correction. Lasting discipline depends on practice that everyone can predict.

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