| Sun Tzu said: | Commentary | 
		
			| 20. The following are the principles to be observed by an invading force: The 
further you penetrate into a country, the greater will be the solidarity of your 
troops, and thus the defenders will not prevail against you. | When soldiers are 
			close to home, any who are thinking of deserting may do so. But 
			further away, this is not likely to be a successful option. Even 
			if not considering desertion, troops keep a mental map of where they 
			are and will naturally feel more isolated and fearful to some extent 
			when further from home. The natural tendency at such times is to 
			stick together as they are now clearly bound to a common fate of 
			victory or likely capture or death. Now the troops depend on you, their leader. They look to you a a 
			savior who will lead them to victory and then back home again. | 
		
			| 21. Make forays in fertile country in order to supply your army with food. | 'An army marches on 
			it's stomach' is a common truism. Fresh food will cheer the troops 
			and help conserve supplies. Taking food in fertile country may also mean that you can allow 
			enough left over for the local population. When passing through 
			places, it does no harm to keep the locals onside. | 
		
			| 22. Carefully study the well-being of your men, and do not overtax them. 
Concentrate your energy and hoard your strength. Keep your army continually on 
the move, and devise unfathomable plans. | Whilst soldiers may 
			expect to work hard, they are also biological machines which can be 
			worn out by too much marching, fighting and stress. Understand the dynamics of the healthy body and, whilst keeping 
			your troops fit (marching helps this), beware of wearing them down. 
			In this way you can sustain energy for battle, wherever it appears. Unfathomable plans not only confuse the enemy, they also keep 
			your own people on their toes and constantly ready for the next 
			move. | 
		
			| 23. Throw your soldiers into positions whence there is no escape, and they 
will prefer death to flight. If they will face death, there is nothing they may 
not achieve. Officers and men alike will put forth their uttermost strength. | If soldiers may be 
			motivated to fight less than their best, then the alternative of 
			death will bring out the best in them. Even those who are 
			motivated, will fight with an extra desperation when they believe 
			there is no alternative. In this way, you may engineer situations where they believe there 
			is no way back and so will fight on to the bitter end. | 
		
			| 24. Soldiers when in desperate straits lose the sense of fear. If there is no 
place of refuge, they will stand firm. If they are in hostile country, they will 
show a stubborn front. If there is no help for it, they will fight hard. | This can also be seen 
			in animals who are normally fearful and will run away, yet will 
			fight like demons when cornered. The 
			life drive is a natural instinct and we will each fight until 
			our last breath. This can be seen in people who are dying in their 
			beds as well as those on the battlefield. | 
		
			| 25. Thus, without waiting to be marshaled, the soldiers will be constantly on 
the qui vive; without waiting to be asked, they will do your will; without 
restrictions, they will be faithful; without giving orders, they can be trusted. | 'qui vive' is seeking 
			life. When soldiers see you as the route to survival, they will 
			follow your orders without question. When they see no alternative, 
			they will be unquestionably loyal. | 
		
			| 26. Prohibit the taking of omens, and do away with superstitious doubts. 
Then, until death itself comes, no calamity need be feared. | There are many 
			superstitions about luck, in particular bad luck. When bad things 
			happen, superstitious people assume they have not completed the 
			right rituals and may go fatalistically to their deaths. When 
			superstition is abolished, facts can be seen and accepted more 
			easily. Then the right thing to do is also more easily accepted. | 
		
			| 27. If our soldiers are not overburdened with money, it is not because they 
have a distaste for riches; if their lives are not unduly long, it is not 
because they are disinclined to longevity. | Being a soldier is to 
			face death, sometimes on a daily basis. This changes how you look at 
			life. It is unsurprising in such situations that the live for the 
			moment and think less of saving for a future than may never be. 
			Soldiers do not sign up because they have a death wish. Nor do they 
			often sign up for the booty. More often it is mundane, such as 
			because they see no other prospects. Perhaps it is about seeking 
			adventure. Maybe it is to do with seeking meaning. For some it might 
			even be about king and country.  | 
		
			| 28. On the day they are ordered out to battle, your soldiers may weep, those 
sitting up bedewing their garments, and those lying down letting the tears run 
down their cheeks. But let them once be brought to bay, and they will display 
the courage of a Chu or a Kuei. | Children are often 
			shocked by the prospect of having to earn their living only on the 
			last day of school. People who lose their jobs when a times get tough are often 
			surprised, even though it it is clear redundancy is coming. Soldiers likewise may be horrified by the sudden realization that 
			within a day they may be dead. The shock may well bring tears and it 
			is good idea to let them weep away their terror. Yet, the next day, children become adults and those who lose 
			their jobs get on with their lives. And soldiers, faced with death 
			in all directions, step up to the mark and fight like heroes.  In fact soldiers inculcated in the psychology of honor would 
			rather die than be thought a coward. They fight for the person next 
			to them, for their platoon, for their regiment. And to avoid at all 
			costs the specter of dishonor. |