Country in which there are precipitous cliffs with torrents running between, 454 deep natural hollows, 455 confined places, 456 tangled thickets, 457 quagmires 458 and crevasses, 459 should be left with all possible speed and not approached.

While we keep away from such places, we should get the enemy to approach them; while we face them, we should let the enemy have them on his rear.