text:  The day after the departure of the AEtolians the Brenn led on the main body of his troops to attack the pass of Thermopylae; whilst a strong detachment received orders to force one of the mountain paths the knowledge of which had been betrayed to him by the inhabitants; being guided by one of whom and their movements being concealed from view by a thick mist which enveloped them this detachment succeeded in surprising the troops who were entrusted with its defence and moving rapidly on they fell on the rear of the main body of the allies who were engaged at Thermopylae