History of the Peloponnesian War by Thucydides — Book I, The affair of Potidaea

Almost immediately after this, fresh differences arose between the Athenians and Peloponnesians, and contributed their share to the war. ^56.2Corinth was forming schemes for retaliation, and Athens suspected her hostility. The Potidaeans, who inhabit the isthmus of Pallene, being a Corinthian colony, but tributary allies of Athens, were ordered to raze the wall looking towards Pallene, to give hostages, to dismiss the Corinthian magistrates, and in future not to receive the persons sent from Corinth annually to succeed them. It was feared that they might be persuaded by Perdiccas and the Corinthians to revolt, and might draw the rest of the allies in the direction of Thrace to revolt with them.

^57.1These precautions against the Potidaeans were taken by the Athenians immediately after the battle at Corcyra. ^57.2Not only was Corinth at length openly hostile, but Perdiccas, son of Alexander, king of the Macedonians, had from an old friend and ally been made an enemy. ^57.3He had been made an enemy by the Athenians entering into alliance with his brother Philip and Derdas, who were in league against him. ^57.4In his alarm he had sent to Lacedaemon to try and involve the Athenians in a war with the Peloponnesians, and was endeavoring to win over Corinth in order to bring about the revolt of Potidaea. ^57.5He also made overtures to the Chalcidians in the direction of Thrace, and to the Bottiaeans, to persuade them to join in the revolt; for he thought that if these places on the border could be made his allies, it would be easier to carry on the war with their co-operation. ^57.6Alive to all this, and wishing to anticipate the revolt of the cities, the Athenians acted as follows. They were just then sending off thirty ships and a thousand heavy infantry for his country under the command of Archestratus, son of Lycomedes, with four colleagues. They instructed the captains to take hostages of the Potidaeans, to raze the wall, and to be on their guard against the revolt of the neighboring cities.

^58.1Meanwhile the Potidaeans sent envoys to Athens on the chance of persuading them to take no new steps in their matters; they also went to Lacedaemon with the Corinthians to secure support in case of need. Failing after prolonged negotiation to obtain anything satisfactory from the Athenians; being unable, for all they could say, to prevent the vessels that were destined for Macedonia from also sailing against them; and receiving from the Lacedaemonian government a promise to invade Attica, if the Athenians should attack Potidaea, the Potidaeans, thus favoured by the moment, at last entered into league with the Chalcidians and Bottiaeans, and revolted. ^58.2And Perdiccas induced the Chalcidians to abandon and demolish their towns on the seaboard, and settling inland at Olynthus, to make that one city a strong place: meanwhile to those who followed his advice he gave a part of his territory in Mygdonia round Lake Bolbe as a place of abode while the war against the Athenians should last. They accordingly demolished their towns, removed inland, and prepared for war.

^59.1The thirty ships of the Athenians, arriving before the Thracian places, found Potidaea and the rest in revolt. ^59.2Their commanders considering it to be quite impossible with their present force to carry on war with Perdiccas, and with the confederate towns as well, turned to Macedonia, their original destination, and having established themselves there, carried on war in co-operation with Philip, and the brothers of Derdas, who had invaded the country from the interior.

^60.1Meanwhile the Corinthians, with Potidaea in revolt, and the Athenian ships on the coast of Macedonia, alarmed for the safety of the place, and thinking its danger theirs, sent volunteers from Corinth, and mercenaries from the rest of Peloponnese, to the number of sixteen hundred heavy infantry in all, and four hundred light troops. ^60.2Aristeus, son of Adimantus, who was always a steady friend to the Potidaeans, took command of the expedition, and it was principally for love of him that most of the men from Corinth volunteered. ^60.3They arrived in Thrace forty days after the revolt of Potidaea.

^61.1The Athenians also immediately received the news of the revolt of the cities. On being informed that Aristeus and his reinforcements were on their way, they sent two thousand heavy infantry of their own citizens and forty ships against the places in revolt, under the command of Callias, son of Calliades, and four colleagues. ^61.2They arrived in Macedonia first, and found the force of a thousand men that had been first sent out, just become masters of Therme and besieging Pydna. ^61.3Accordingly they also joined in the investment, and besieged Pydna for a while. Subsequently they came to terms and concluded a forced alliance with Perdiccas, hastened by the calls of Potidaea, and by the arrival of Aristeus at that place. They withdrew from Macedonia, ^61.4going to Beroea and thence to Strepsa, and, after a futile attempt on the latter place, they pursued by land their march to Potidaea with three thousand heavy infantry of their own citizens, besides a number of their allies, and six hundred Macedonian horsemen, the followers of Philip and Pausanias. With these sailed seventy ships along the coast. ^61.5Advancing by short marches, on the third day they arrived at Gigonus, where they encamped.

^62.1Meanwhile the Potidaeans and the Peloponnesians with Aristeus were encamped on the side looking towards Olynthus on the isthmus, in expectation of the Athenians, and had established their market outside the city. ^62.2The allies had chosen Aristeus general of all the infantry; while the command of the cavalry was given to Perdiccas, who had at once left the alliance of the Athenians and gone back to that of the Potidaeans, having deputed Iolaus as his general. ^62.3The 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. ^62.4While 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. ^62.5After they had arrived at the isthmus, and saw the enemy preparing for battle, they formed against him, and soon afterwards engaged. ^62.6The 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.

^63.1Returning from the pursuit, Aristeus perceived the defeat of the rest of the army. Being at a loss which of the two risks to choose, whether to go to Olynthus or to Potidaea, he at last determined to draw his men into as small a space as possible, and force his way with a run into Potidaea. Not without difficulty, through a storm of missiles, he passed along by the breakwater through the sea, and brought off most of his men safe, though a few were lost. ^63.2Meanwhile the auxiliaries of the Potidaeans from Olynthus, which is about seven miles off, and in sight of Potidaea, when the battle began and the signals were raised, advanced a little way to render assistance; and the Macedonian horse formed against them to prevent it. But on victory speedily declaring for the Athenians and the signals being taken down, they retired back within the wall; and the Macedonians returned to the Athenians. Thus there were no cavalry present on either side. ^63.3After the battle the Athenians set up a trophy, and gave back their dead to the Potidaeans under truce. The Potidaeans and their allies had close upon three hundred killed; the Athenians a hundred and fifty of their own citizens, and Callias their general.

^64.1The wall on the side of the isthmus had now works at once raised against it, and manned by the Athenians. That on the side of Pallene had no works raised against it. They did not think themselves strong enough at once to keep a garrison in the isthmus, and to cross over to Pallene and raise works there; they were afraid that the Potidaeans and their allies might take advantage of their division to attack them. ^64.2Meanwhile the Athenians at home learning that there were no works at Pallene, sometime afterwards sent off sixteen hundred heavy infantry of their own citizens under the command of Phormio, son of Asopius. Arrived at Pallene, he fixed his headquarters at Aphytis, and led his army against Potidaea by short marches, ravaging the country as he advanced. No one venturing to meet him in the field, he raised works against the wall on the side of Pallene. ^64.3So at length Potidaea was strongly invested on either side, and from the sea by the ships cooperating in the blockade.

^65.1Aristeus, seeing its investment complete, and having no hope of its salvation, except in the event of some movement from the Peloponnese, or of some other improbable contingency, advised all except five hundred to watch for a wind, and sail out of the place, in order that their provisions might last the longer. He was willing to be himself one of those who remained. Unable to persuade them, and desirous of acting on the next alternative, and of having things outside in the best posture possible, he eluded the guardships of the Athenians and sailed out. ^65.2Remaining among the Chalcidians, he continued to carry on the war; in particular he laid an ambuscade near the city of the Sermylians, and cut off many of them; he also communicated with Peloponnese, and tried to contrive some method by which help might be brought. ^65.3Meanwhile, after the completion of the investment of Potidaea, Phormio next employed his sixteen hundred men in ravaging Chalcidice and Bottica: some of the towns also were taken by him.