History of the Peloponnesian War

For hitherto, since the island was for the most part covered with woods and had no roads, having never been inhabited, he had been afraid to land, thinking that the terrain was rather in the enemy's favour; for they could attack from an unseen position and inflict damage upon a large army after it had landed. To his own troops, indeed, the mistakes and the preparations of the enemy would not be equally clear by reason of the woods, whereas all their own mistakes would be manifest to their opponents, and so they could fall upon them unexpectedly wherever they wished, since the power of attack would rest with them.

If, on the other hand, he should force his way into the thicket and there close with the enemy, the smaller force which was acquainted with the ground would, he thought, be stronger than the larger number who were unacquainted with it; and his own army, though large, would be destroyed piece-meal before he knew it, because there was no possible way of seeing the points at which the detachments should assist one another.