History of the Peloponnesian War

But Callias, the commander of the Athenians, and his colleagues sent the Macedonian cavalry and a few of the allies toward Olynthus, to shut off aid from that quarter, while they themselves broke camp and advanced against Potidaea.

And when they arrived at the isthmus and saw the enemy preparing for battle, they took up their position facing them and soon the two sides joined battle.

And the wing led by Aristeus himself, which included the picked Corinthian and other troops, routed the forces opposed to them and pressed on a long distance in pursuit; but the rest of the army of the Potidaeans and the Peloponnesians was worsted by the Athenians and took refuge within the walls of Potidaea.