Summer was now over. The winter following, the plague a second time attacked the Athenians; for although it had never entirely left them, still there had been a notable abatement in its ravages. The second visit lasted no less than a year, the first having lasted two; and nothing distressed the Athenians and reduced their power more than this. No less than four thousand four hundred heavy infantry in the ranks died of it and three hundred cavalry, besides a number of the multitude that was never ascertained. At the same time took place the numerous earthquakes in Athens, Euboea, and Boeotia, particularly at Orchomenus in the last-named country.
The same winter the Athenians in Sicily and the Rhegians, with thirty ships, made an expedition against the islands of Aeolus; it being impossible to invade them in summer, owing to the want of water. These islands are occupied by the Liparaeans, a Cnidian colony, who live in one of them of no great size called Lipara; and from this as their headquarters cultivate the rest, Didyme, Strongyle, and Hiera. In Hiera the people in those parts believe that Hephaestus has his forge, from the quantity of flame which they see it send out by night, and of smoke by day. These islands lie off the coast of the Sicels and Messinese, and were allies of the Syracusans. The Athenians laid waste their land, and as the inhabitants did not submit, sailed back to Rhegium. Thus the winter ended, and with it ended the fifth year of this war, of which Thucydides was the historian.
The next summer the Peloponnesians and their allies set out to invade Attica under the command of Agis, son of Archidamus, and went as far as the Isthmus, but numerous earthquakes occurring, turned back again without the invasion taking place. About the same time that these earthquakes were so common, the sea at Orobiae, in Euboea, retiring from the then line of coast, returned in a huge wave and invaded a great part of the town, and retreated leaving some of it still under water; so that what was once land is now sea; such of the inhabitants perishing as could not run up to the higher ground in time. A similar inundation also occurred at Atalanta, the island off the Opuntian Locrian coast, carrying away part of the Athenian fort and wrecking one of two ships which were drawn up on the beach. At Peparethus also the sea retreated a little, without however any inundation following; and an earthquake threw down part of the wall, the town hall, and a few other buildings. The cause, in my opinion, of this phenomenon must be sought in the earthquake. At the point where its shock has been the most violent, the sea is driven back and, suddenly recoiling with redoubled force, causes the inundation. Without an earthquake I do not see how such an accident could happen.
During the same summer different operations were carried on by the different belligerents in Sicily; by the Siceliots themselves against each other, and by the Athenians and their allies: I shall however confine myself to the actions in which the Athenians took part, choosing the most important. The death of the Athenian general Charoeades, killed by the Syracusans in battle, left Laches in the sole command of the fleet, which he now directed in concert with the allies against Mylae, a place belonging to the Messinese. Two Messinese battalions in garrison at Mylae laid an ambush for the party landing from the ships, but were routed with great slaughter by the Athenians and their allies, who thereupon assaulted the fortification and compelled them to surrender the Acropolis and to march with them upon Messina. This town afterwards also submitted upon the approach of the Athenians and their allies, and gave hostages and all other securities required.
The same summer the Athenians sent thirty ships round Peloponnese under Demosthenes, son of Alcisthenes, and Procles, son of Theodorus, and sixty others, with two thousand heavy infantry, against Melos, under Nicias, son of Niceratus; wishing to reduce the Melians, who, although islanders, refused to be subjects of Athens or even to join her confederacy. The devastation of their land not procuring their submission, the fleet, weighing from Melos, sailed to Oropus in the territory of Graea, and landing at nightfall, the heavy infantry started at once from the ships by land for Tanagra in Boeotia, where they were met by the whole levy from Athens, agreeably to a concerted signal, under the command of Hipponicus, son of Callias, and Eurymedon, son of Thucles. They encamped, and passing that day in ravaging the Tanagraean territory, remained there for the night; and next day, after defeating those of the Tanagraeans who sailed out against them and some Thebans who had come up to help the Tanagraeans, took some arms, set up a trophy, and retired, the troops to the city and the others to the ships. Nicias with his sixty ships coasted alongshore and ravaged the Locrian seaboard, and so returned home.
About this time the Lacedaemonians founded their colony of Heraclea in Trachis, their object being the following: the Malians form in all three tribes, the Paralians, the Hiereans, and the Trachinians. The last of these having suffered severely in a war with their neighbours the Oetaeans, at first intended to give themselves up to Athens; but afterwards fearing not to find in her the security that they sought, sent to Lacedaemon, having chosen Tisamenus for their ambassador. In this embassy joined also the Dorians from the mother country of the Lacedaemonians, with the same request, as they themselves also suffered from the same enemy. After hearing them, the Lacedaemonians determined to send out the colony, wishing to assist the Trachinians and Dorians, and also because they thought that the proposed town would lie conveniently for the purposes of the war against the Athenians. A fleet might be got ready there against Euboea, with the advantage of a short passage to the island; and the town would also be useful as a station on the road to Thrace. In short, everything made the Lacedaemonians eager to found the place. After first consulting the god at Delphi and receiving a favourable answer, they sent off the colonists, Spartans, and Perioeci, inviting also any of the rest of the Hellenes who might wish to accompany them, except Ionians, Achaeans, and certain other nationalities; three Lacedaemonians leading as founders of the colony, Leon, Alcidas, and Damagon. The settlement effected, they fortified anew the city, now called Heraclea, distant about four miles and a half from Thermopylae and two miles and a quarter from the sea, and commenced building docks, closing the side towards Thermopylae just by the pass itself, in order that they might be easily defended.
The foundation of this town, evidently meant to annoy Euboea (the passage across to Cenaeum in that island being a short one), at first caused some alarm at Athens, which the event however did nothing to justify, the town never giving them any trouble. The reason of this was as follows. The Thessalians, who were sovereign in those parts, and whose territory was menaced by its foundation, were afraid that it might prove a very powerful neighbour, and accordingly continually harassed and made war upon the new settlers, until they at last wore them out in spite of their originally considerable numbers, people flocking from all quarters to a place founded by the Lacedaemonians, and thus thought secure of prosperity. On the other hand the Lacedaemonians themselves, in the persons of their governors, did their full share towards ruining its prosperity and reducing its population, as they frightened away the greater part of the inhabitants by governing harshly and in some cases not fairly, and thus made it easier for their neighbours to prevail against them.
The same summer, about the same time that the Athenians were detained at Melos, their fellow citizens in the thirty ships cruising round Peloponnese, after cutting off some guards in an ambush at Ellomenus in Leucadia, subsequently went against Leucas itself with a large armament, having been reinforced by the whole levy of the Acarnanians except Oeniadae, and by the Zacynthians and Cephallenians and fifteen ships from Corcyra. While the Leucadians witnessed the devastation of their land, without and within the isthmus upon which the town of Leucas and the temple of Apollo stand, without making any movement on account of the overwhelming numbers of the enemy, the Acarnanians urged Demosthenes, the Athenian general, to build a wall so as to cut off the town from the continent, a measure which they were convinced would secure its capture and rid them once and for all of a most troublesome enemy.
Demosthenes however had in the meanwhile been persuaded by the Messenians that it was a fine opportunity for him, having so large an army assembled, to attack the Aetolians, who were not only the enemies of Naupactus, but whose reduction would further make it easy to gain the rest of that part of the continent for the Athenians. The Aetolian nation, although numerous and warlike, yet dwelt in unwalled villages scattered far apart, and had nothing but light armour, and might, according to the Messenians, be subdued without much difficulty before succours could arrive. The plan which they recommended was to attack first the Apodotians, next the Ophionians, and after these the Eurytanians, who are the largest tribe in Aetolia, and speak, as is said, a language exceedingly difficult to understand, and eat their flesh raw. These once subdued, the rest would easily come in.
To this plan Demosthenes consented, not only to please the Messenians, but also in the belief that by adding the Aetolians to his other continental allies he would be able, without aid from home, to march against the Boeotians by way of Ozolian Locris to Kytinium in Doris, keeping Parnassus on his right until he descended to the Phocians, whom he could force to join him if their ancient friendship for Athens did not, as he anticipated, at once decide them to do so. Arrived in Phocis he was already upon the frontier of Boeotia. He accordingly weighed from Leucas, against the wish of the Acarnanians, and with his whole armament sailed along the coast to Sollium, where he communicated to them his intention; and upon their refusing to agree to it on account of the non-investment of Leucas, himself with the rest of the forces, the Cephallenians, the Messenians, and Zacynthians, and three hundred Athenian marines from his own ships (the fifteen Corcyraean vessels having departed), started on his expedition against the Aetolians. His base he established at Oeneon in Locris, as the Ozolian Locrians were allies of Athens and were to meet him with all their forces in the interior. Being neighbours of the Aetolians and armed in the same way, it was thought that they would be of great service upon the expedition, from their acquaintance with the localities and the warfare of the inhabitants.