9.15

Chapter: The Army on the March 9.15
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Translation:

Country in which there are precipitous cliffs with torrents running between, deep natural hollows, confined places, tangled thickets, quagmires and crevasses, should be left with all possible speed and not approached.

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Commentary

The best country for easy movement is open and clear. Cliffs, rivers, and so on are obstacles that must be surmounted or another route found.

Barriers to free movement also offer places for enemies to entrap and corner you. If you do not wish to hold a place, them easy passage is the main preference.