11. The Nine Situations
We cannot enter into alliance with neighboring princes until we are acquainted with their designs. We are not fit to lead an army on the march unless we are familiar with the face of the country—its mountains and forests, its pitfalls and precipices, its marshes and swamps. We shall be unable to turn natural advantages to account unless we make use of local guides.
These three sentences are repeated from VII. SS. 12-14—in order to emphasize their importance, the commentators seem to think. I prefer to regard them as interpolated here in order to form an antecedent to the following words. With regard to local guides, Sun Tzu might have added that there is always the risk of going wrong, either through their treachery or some misunderstanding such as Livy records (XXII. 13): Hannibal, we are told, ordered a guide to lead him into the neighborhood of Casinum, where there was an important pass to be occupied; but his Carthaginian accent, unsuited to the pronunciation of Latin names, caused the guide to understand Casilinum instead of Casinum, and turning from his proper route, he took the army in that direction, the mistake not being discovered until they had almost arrived.