9. The Army on the March
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English translation
Original Chinese text
孙子曰:凡处军相敌,绝山依谷,视生处高,战隆无登,此处山之军也。绝水必远水,客绝水而来,勿迎之于水内,令半济而击之,利;欲战者,无附于水而迎客,视生处高,无迎水流,此处水上之军也。绝斥泽,惟亟去无留,若交军于斥泽之中,必依水草,而背众树,此处斥泽之军也。平陆处易,而右背高,前死后生,此处平陆之军也。凡此四军之利,黄帝之所以胜四帝也。
English translation
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
凡军好高而恶下,贵阳而贱阴,养生而处实,军无百疾,是谓必胜。丘陵堤防,必处其阳,而右背之,此兵之利,地之助也。上雨,水沫至,欲涉者,待其定也。
English translation
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
凡地有绝涧,遇天井、天牢、天罗、天陷、天隙,必亟去之,勿近也。吾远之,敌近之;吾迎之,敌背之。军旁有险阻、潢井、葭苇、林木、蘙荟者,必谨覆索之,此伏奸之所处也。
English translation
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
敌近而静者,恃其险也;远而挑战者,欲人之进也;其所居易者,利也;众树动者,来也;众草多障者,疑也;鸟起者,伏也;兽骇者,覆也;尘高而锐者,车来也;卑而广者,徒来也;散而条达者,樵采也;少而往来者,营军也;辞卑而益备者,进也;辞强而进驱者,退也;轻车先出,居其侧者,阵也;无约而请和者,谋也;奔走而陈兵者,期也;半进半退者,诱也;杖而立者,饥也;汲而先饮者,渴也;见利而不进者,劳也;鸟集者,虚也;夜呼者,恐也;军扰者,将不重也;旌旗动者,乱也;吏怒者,倦也;粟马肉食,军无悬缻,而不返其舍者,穷寇也;谆谆翕翕,徐与人言者,失众也;数赏者,窘也;数罚者,困也;先暴而后畏其众者,不精之至也;来委谢者,欲休息也。
English translation
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
兵怒而相迎,久而不合,又不相去,必谨察之。
English translation
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
故兵非贵,惟无武进,足以并力、料敌、取人而已。夫惟无虑而易敌者,必擒于人。
English translation
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
卒未亲附而罚之,则不服,不服则难用也。卒已亲附而罚不行,则不可用也。故令之以文,齐之以武,是谓必取。令素行以教其民,则民服;令素不行以教其民,则民不服。令素行者,与众相得也。
English translation
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.