ThcddsPlpnnsn #94 History of the Peloponnesian War/Book 1

http://en.wikisource.org/wiki/History_of_the_Peloponnesian_War - the Potidaeans, having deputed Iolaus as his general: The plan of Aristeus was to keep his own force on the isthmus, and await the attack of the Athenians; leaving the Chalcidians and the allies outside the isthmus, and the two hundred cavalry from Perdiccas in Olynthus to act upon the Athenian rear, on the occasion of their advancing against him; and thus to place the enemy between two fires. While Callias the Athenian general and his 62 61 60 colleagues dispatched the Macedonian horse and a few of the allies to Olynthus, to prevent any movement being made from that quarter, the Athenians themselves broke up their camp and marched against Potidaea. After they had arrived at the isthmus, and saw the enemy preparing for battle, they formed against him, and soon afterwards