History of the Peloponnesian War

But Callias the Athenian general, and the rest that were in commission with him, sent out before them their Macedonian horsemen and some few of their confederates to Olynthus to stop those within from making any sally from the town, and then dislodging marched on towards Potidaea.

When they were come on as far as the isthmus and saw the enemy make ready to fight, they also did the like;

and not long after they joined battle. That wing wherein was Aristeus himself with the chosen men of the Corinthians and others put to flight that part of their enemies that stood opposite unto them and followed execution a great way. But the rest of the army of the Potidaeans and Peloponnesians were by the Athenians defeated and fled into the city.