History of the Peloponnesian War

While Callias the Athenian general and his colleagues despatched 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 engaged.

The wing of Aristeus, with the Corinthians and other picked troops round him, routed the wing opposed to it, and followed for a considerable distance in pursuit. But the rest of the army of the Potidaeans and of the Peloponnesians was defeated by the Athenians, and took refuge within the fortifications.