History of the Peloponnesian War

The purpose of Aristeus was to have the body of the army with himself within the isthmus and therewith to attend the coming on of the Athenians, and to have the Chalcideans and their confederates without the isthmus, and also the two hundred horse under Perdiccas, to stay in Olynthus, and when the Athenians were passed by, to come on their backs and to inclose the enemy betwixt them.

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.

And Aristeus, when he came back from the execution, was in doubt what way to take, to Olynthus or to Potidaea. In the end he resolved of the shortest way, and with his soldiers about him ran as hard as he was able into Potidaea, and with much ado got in at the pier through the sea, cruelly shot at and with the loss of a few but the safety of the greatest part of his company.

As soon as the battle began, they that should have seconded the Potidaeans from Olynthus (for it is at most but sixty furlongs off, and in sight) advanced a little way to have aided them; and the Macedonian horse opposed themselves likewise in order of battle to keep them back. But the Athenians having quickly gotten the victory, and the standards being taken down, they retired again, they of Olynthus into that city, and the Macedonian horsemen into the army of the Athenians. So that neither side had their cavalry at the battle.

After the battle the Athenians erected a trophy and gave truce to the Potidaeans for the taking up of the bodies of their dead. Of the Potidaeans and their friends there died somewhat less than three hundred, and of the Athenians themselves one hundred and fifty, with Callias one of their commanders.