The Art of War, Chapter 2: 作戰 (Waging War)

Chapter 1 decides whether to fight. Chapter 2 prices the decision. It is the chapter about money, logistics and time, and it argues that a campaign’s cost is mostly set by how long it lasts.

Like every chapter in this series, it has three parts: the reading, an analysis of what the chapter argues, and how finance professionals can interpret it in their own work. The original text follows the Chinese Wikisource edition of 《孫子兵法》. The Chinese and English explanations are Claude’s own paraphrase.

Reading the chapter

2.1

原文

孫子曰：凡用兵之法，馳車千駟，革車千乘，帶甲十萬，千里饋糧，則內外之費，賓客之用，膠漆之材，車甲之奉，日費千金，然後十萬之師舉矣。

中文解說

孫子說：用兵作戰的通則是，要出動輕車千輛、重車千輛、士兵十萬，還要千里運送糧食。於是前方與後方的開支、款待使節賓客的費用、修造器械的膠漆材料、車輛和盔甲的供給，每天都要耗費千金，這樣十萬大軍才能出動。

English

A campaign of this size needs a thousand fast chariots, a thousand heavy wagons and a hundred thousand armoured troops, with grain carried over great distances. Add the spending at home and at the front, the cost of diplomacy, the materials for repairs, and the supply of vehicles and armour. It costs a thousand pieces of gold a day before the army can even move.

The figures illustrate scale. The point is that the bill starts running before the first engagement.

2.2

原文

其用戰也，貴勝，久則鈍兵挫銳，攻城則力屈，久暴師則國用不足。夫鈍兵挫銳，屈力殫貨，則諸侯乘其弊而起，雖有智者，不能善其後矣。

中文解說

用兵打仗，貴在速勝。拖得久，兵器就會變鈍，士氣就會受挫；攻城，兵力就會耗盡；軍隊長期在外，國家的財用就會不足。軍隊疲憊、士氣受挫、力量耗盡、資財枯竭，其他諸侯就會趁著你的困境起兵，到那時，即使有智謀的人，也無法收拾殘局了。

English

In war the aim is a quick victory. Prolonged fighting blunts the weapons and dampens morale. Besieging cities exhausts strength. A long campaign drains the state's resources. Once the army is dull, the strength spent and the treasury empty, rival powers will move on your weakness, and not even a wise adviser can repair that.

2.3

原文

故兵聞拙速，未睹巧之久也。夫兵久而國利者，未之有也。故不盡知用兵之害者，則不能盡知用兵之利也。

中文解說

所以用兵只聽說過寧可笨拙而求速勝，從未見過靠精巧而拖延長久的。戰爭久拖而對國家有利的，從來沒有過。因此，不能完全了解用兵害處的人，也就不能完全了解用兵的好處。

English

So the saying is that a clumsy but quick campaign has been seen, while a skilful but prolonged one has not. No country has ever benefited from a long war. Someone who does not fully understand the harm of waging war cannot fully understand its benefit.

The last sentence is the one to keep. A benefit can only be judged after the full cost has been counted.

2.4

原文

善用兵者，役不再籍，糧不三載；取用於國，因糧於敵，故軍食可足也。

中文解說

善於用兵的人，兵員不用再次徵集，糧食不用多次運送。武器裝備從本國取用，糧食則在敵境就地解決，這樣軍隊的糧食供應就充足了。

English

A skilled commander does not conscript twice or resupply three times. Equipment comes from home, but food is taken from the enemy's land, so the army is fed.

2.5

原文

國之貧於師者遠輸，遠輸則百姓貧；近師者貴賣，貴賣則百姓財竭，財竭則急於丘役。力屈財殫，中原內虛於家。百姓之費，十去其七；公家之費，破車罷馬，甲胄矢弩，戟楯蔽櫓，丘牛大車，十去其六。

中文解說

國家因出兵而貧困，是由於遠道運輸；遠道運輸，百姓就會貧困。駐軍附近物價飛漲，物價飛漲，百姓的錢財就會枯竭，錢財枯竭，就急於應付賦稅和勞役。力量耗盡、財富用光，國內家家空虛。百姓的家產要耗去十分之七；公家的開支，如損壞的戰車、疲憊的馬匹、盔甲、箭弩、戟盾、大盾牌和運輸用的牛車，也要耗去十分之六。

English

A state is impoverished by an army when supplies must travel far, and long supply lines impoverish the people. Prices rise near the army, which drains the people's savings and makes the demand for taxes and labour more urgent. With strength spent and wealth gone, homes are emptied. Households lose seven-tenths of their means, and the state loses six-tenths on broken chariots, worn-out horses, armour, weapons, shields and draught oxen.

The chapter shows the cost spreading outward from the army to the wider economy. It is the cost that nobody budgeted for.

2.6

原文

故智將務食於敵，食敵一鍾，當吾二十鍾；萁稈一石，當吾二十石。

中文解說

所以聰明的將領一定設法在敵境取得糧食。吃敵人一鍾糧，相當於從本國運來二十鍾；用敵人一石飼料，相當於從本國運來二十石。

English

So a wise commander works to feed the army from the enemy's land. One unit of the enemy's grain is worth twenty of your own, because of what it costs to carry it. The same goes for fodder.

2.7

原文

故殺敵者，怒也；取敵之利者，貨也。故車戰，得車十乘以上，賞其先得者，而更其旌旗。車雜而乘之，卒善而養之，是謂勝敵而益強。

中文解說

要使士兵奮勇殺敵，就要激發他們的鬥志；要使士兵奪取敵人的物資，就要用財物獎賞他們。所以在車戰中，繳獲戰車十輛以上，就獎賞最先奪得的人，並換上我方的旗幟，把繳獲的戰車混編在自己的車隊中使用，對俘虜的士兵給予善待，使其歸附。這就叫做戰勝敵人而使自己更強大。

English

Soldiers fight when they are angry, and they take the enemy's goods when they are rewarded for it. So when ten or more chariots are captured, reward whoever took the first one, replace the enemy's flags with your own, mix the captured chariots into your own, and treat the prisoners well. This is what it means to defeat the enemy and grow stronger by doing so.

2.8

原文

故兵貴勝，不貴久。故知兵之將，民之司命，國家安危之主也。

中文解說

所以用兵貴在速勝，不貴在持久。懂得用兵之道的將領，掌握著民眾的命運，也是國家安危的主宰。

English

War values victory, not duration. A commander who understands war holds the fate of the people and decides whether the state is safe or in danger.

Analysis: what the chapter argues

Cost starts before contact. 2.1 lists the expenses in order: troops, vehicles, supply, diplomacy, repairs. The bill runs daily from the moment the army is raised, not from the first battle.

Time is the multiplier. 2.2 and 2.3 argue that most of a campaign’s cost comes from its length. Duration blunts the weapons, wears down morale, drains the treasury and invites rivals to move. The text says that no state has benefited from a long war.

A weakened party attracts opportunists. In 2.2 the rivals who “move on your weakness” are the third parties. The danger of overextension is partly what the other powers will do with it.

Read 拙速 carefully. 2.3 prefers a clumsy but swift campaign to a skilful but prolonged one. The claim is about the length of the engagement, not about acting without preparation. Chapter 1 is where the careful planning happens. Speed here means not letting the campaign drift.

A benefit is only known after the cost. The last sentence of 2.3 says that you cannot fully understand the benefit of war without fully understanding its harm.

Reduce the cost of supply. 2.4 and 2.6 recommend feeding the army from the enemy’s land, because transport is the largest hidden cost. The claim in 2.6 is that a unit obtained on the spot is worth many carried from home. 2.5 shows the other side: long supply lines impoverish the home economy.

Incentives and absorption. 2.7 pays soldiers for captured assets, then integrates what was captured and treats the prisoners well. Victory only counts if it leaves you stronger (勝敵而益強).

The commander carries the responsibility. 2.8 closes the chapter by saying that the person who understands this holds the outcome for the whole state.

How finance professionals can read it

This section is Claude’s interpretation. Sun Tzu wrote about armies, and none of the mappings below are his. Chapter 1 ended on a count of favourable factors. This chapter adds the other half of the count: what the commitment costs and how long it lasts.

Investing

• Price the holding period, not only the entry. The daily cost in 2.1 maps to carry: funding cost, management time, monitoring, fees and the capital that is unavailable for other uses while the position is open.
• Time is a risk factor. If the thesis needs a long time to play out, the cost of waiting belongs in the return calculation. A return that is attractive over three years may not be attractive if it takes six.
• Check what the investment demands after closing. 2.5 shows that the real bill falls on those who were not part of the decision. For an investment, those are the liabilities, upkeep, follow-on funding and the management attention that come after the purchase.
• Plan the exit as part of the entry. 2.3 says that understanding the harm is part of understanding the benefit. A thesis with no credible exit path has an unpriced cost.

Raising funds

• A long process is a cost. Each month spent on a raise is a month of management time and of runway. Time also exposes the company: if the process drags, investors and competitors learn what the company cannot say publicly.
• Prefer a closeable round to a perfect one. 拙速 argues for a clean, well-prepared raise that closes over an ideal one that does not. This only works if the preparation was done in Chapter 1.
• Count the full cost of the capital. Dilution, coupon, covenants, fees, reporting obligations and the time spent on investor relations are the equivalent of the supply lines in 2.5.
• Watch for third parties. A company that looks short of cash invites others to move on its weakness, including lenders, suppliers and rival bidders.

M&A

• Deal fatigue is a cost. A process that runs long wears down the team, increases the chance of a leak and gives the other side time to find alternatives. Set a timetable and treat extensions as a decision.
• Budget the post-closing bill. Integration, retention, systems, restructuring and the management attention they take are the cost that 2.5 says nobody budgeted for. Count it before agreeing a price.
• Use the target’s resources where it is lawful and sensible. 因糧於敵 can be read as funding part of the transaction from the target’s own cash, assets or cash flow. This is a reading by analogy and must be tested against the law, the financing documents and the target’s creditors.
• Win, then absorb. 2.7 says victory counts when it leaves you stronger. In an acquisition that means keeping the key people, honouring the commitments made to the staff and combining the businesses deliberately.
• Know who is waiting. A buyer stretched by one deal is exposed to rivals and to counterparties on the next. 2.2 treats overextension as an invitation.

Across all three

• Cost the time, not only the amount. For any commitment, ask what it costs per month and how many months it could take.
• Set a time limit in advance. Decide how long you will stay in before you commit, and what will trigger a review.
• Count who pays. The cost in 2.5 falls on people who were not at the table. Ask who bears the cost of this decision and whether they have been counted.

Questions to carry into the next chapter

Chapter 3 (謀攻) takes the cost argument one step further: the best result is winning without the expense of fighting.

• What is the monthly cost of your current commitment, and have you written it down?
• When did you last set a time limit on a deal before starting it?
• Which costs in your current plan fall on people who are not in the room?