The Historians' History of the World 03 [Greece to the Peloponnesian War]

THE WAR WITH POTIDÆA AND MACEDONIA

[433-432 B.C.]

The Corinthians had incurred an immense cost, and taxed all their willing allies, only to leave their enemy stronger than she was before. From this time forward they considered the Thirty Years’ Truce as broken, and conceived a hatred, alike deadly and undisguised, against Athens; so that the latter gained nothing by the moderation of her admirals in sparing the Corinthian fleet off the coast of Epirus. An opportunity was not long wanting for the Corinthians to strike a blow at their enemy, through one of her widespread dependencies.

On the isthmus of that lesser peninsula called Pallene, which forms the westernmost of the three prongs of the greater Thracian peninsula called Chalcidice, between the Thermaic and the Strymonic gulfs, was situated the Dorian town of Potidæa, one of the tributary allies of Athens, but originally colonised from Corinth, and still maintaining a certain metropolitan allegiance towards the latter: insomuch that every year certain Corinthians were sent thither as magistrates under the title of Epidemiurgi. On various points of the neighbouring coast, also, there were several small towns belonging to the Chalcidians and Bottiæans, enrolled in like manner in the list of Athenian tributaries. The neighbouring inland territory, Mygdonia and Chalcidice, was held by the Macedonian king, Perdiccas, son of that Alexander who had taken part, fifty years before, in the expedition of Xerxes. These two princes appear gradually to have extended their dominions, after the ruin of Persian power in Thrace by the exertions of Athens, until at length they acquired all the territory between the rivers Axius and Strymon. Now Perdiccas had been for some time the friend and ally of Athens; but there were other Macedonian princes, his brother Philip, and Derdas, holding independent principalities in the upper country, apparently on the higher course of the Axius near the Pæonian tribes, with whom he was in a state of dispute. These princes having been accepted as the allies of Athens, Perdiccas from that time became her active enemy, and it was from his intrigues that all the difficulties of Athens on that coast took their first origin. The Athenian empire was much less complete and secure over the seaports on the mainland than over the islands: for the former were always more or less dependent on any powerful land-neighbour, sometimes more dependent on him than upon the mistress of the sea; and we shall find Athens herself cultivating assiduously the favour of Sitalces and other strong Thracian potentates, as an aid to her dominion over the seaports. Perdiccas immediately began to incite and aid the Chalcidians and Bottiæans to revolt from Athens, and the violent enmity against the latter, kindled in the bosoms of the Corinthians by the recent events at Corcyra, enabled him to extend the same projects to Potidæa. Not only did he send envoys to Corinth in order to concert measures for provoking the revolt of Potidæa, but also to Sparta, instigating the Peloponnesian league to a general declaration of war against Athens. And he further prevailed on many of the Chalcidian inhabitants to abandon their separate small town on the seacoast, for the purpose of joint residence at Olynthus, which was several stadia from the sea. Thus that town, as well as the Chalcidian interest, became much strengthened, while Perdiccas further assigned some territory near Lake Bolbe to contribute to the temporary maintenance of the concentrated population.

The Athenians were not ignorant either of his hostile preparations or of the dangers which awaited them from Corinth after the Corcyræan sea-fight immediately after which they sent to take precautions against the revolt of Potidæa; requiring the inhabitants to take down their wall on the side of Pallene, so as to leave the town open on the side of the peninsula, or on what may be called the sea-side, and fortified only towards the mainland—requiring them further both to deliver hostages and to dismiss the annual magistrates who came to them from Corinth. An Athenian armament of thirty triremes and one thousand hoplites, under Archestratus and ten others, despatched to act against Perdiccas in the Thermaic gulf, was directed at the same time to enforce these requisitions against Potidæa, and to repress any dispositions to revolt among the neighbouring Chalcidians. Immediately on receiving the requisitions, the Potidæans sent envoys both to Athens, for the purpose of evading and gaining time, and to Sparta, in conjunction with Corinth, in order to determine a Lacedæmonian invasion of Attica, in the event of Potidæa being attacked by Athens. From the Spartan authorities they obtained a distinct affirmative promise, in spite of the Thirty Years’ Truce still subsisting: at Athens they had no success, and they accordingly openly revolted (seemingly about midsummer 432 B.C.), at the same time that the armament under Archestratus sailed. The Chalcidians and Bottiæans revolted also, at the express instigation of Corinth, accompanied by solemn oaths and promises of assistance. Archestratus with his fleet, on reaching the Thermaic gulf, found them all in proclaimed enmity, but was obliged to confine himself to the attack of Perdiccas in Macedonia, not having numbers enough to admit of a division of his force. He accordingly laid siege to Therma, in co-operation with the Macedonian troops from the upper country, under Philip and the brothers of Derdas; after taking that place, he next proceeded to besiege Pydna. But it would probably have been wiser had he turned his whole force instantly to the blockade of Potidæa; for during the period of more than six weeks that he spent in the operations against Therma, the Corinthians conveyed to Potidæa a reinforcement of sixteen hundred hoplites and four hundred light-armed, partly their own citizens, partly Peloponnesians, hired for the occasion—under Aristeus, son of Adimantus, a man of such eminent popularity, both at Corinth and at Potidæa, that most of the soldiers volunteered on his personal account. Potidæa was thus put in a state of complete defence shortly after the news of its revolt reached Athens, and long before any second armament could be sent to attack it. A second armament, however, was speedily sent forth—forty triremes and two thousand Athenian hoplites under Callias, son of Calliades, with four other commanders—who on reaching the Thermaic gulf, joined the former body at the siege of Pydna. After prosecuting the siege in vain for a short time, they found themselves obliged to patch up an accommodation on the best terms they could with Perdiccas, from the necessity of commencing immediate operations against Aristeus and Potidæa. They then quitted Macedonia, first crossing by sea from Pydna to the eastern coast of the Thermaic Gulf—next attacking, though without effect, the town of Berœa—and then marching by land along the eastern coast of the gulf, in the direction of Potidæa. On the third day of easy march, they reached the seaport called Gigonus, near which they encamped.