This, then, was the nature of the pass. The Persians crossed the Asopus and travelled all night along this path, with the Oetaean mountains on their right and the Trachinian on their left. At dawn they came to the summit of the pass. In this part of the mountain one thousand armed men of the Phocians were on watch, as I have already shown, defending their own country and guarding the path. The lower pass was held by those I have mentioned, but the Phocians had voluntarily promised Leonidas to guard the path over the mountain.