History of the Peloponnesian War by Thucydides — Book VII, The cost of Decelea; Mycalessus

This same summer arrived at Athens thirteen hundred targeteers, Thracian swordsmen of the tribe of the Dii, who were to have sailed to Sicily with Demosthenes. ^27.2Since they had come too late, the Athenians determined to send them back to Thrace, whence they had come; to keep them for the Decelean war appearing too expensive, as the pay of each man was a drachma a day. ^27.3Indeed since Decelea had been first fortified by the whole Peloponnesian army during this summer, and then occupied for the annoyance of the country by the garrisons from the cities relieving each other at stated intervals, it had been doing great mischief to the Athenians; in fact this occupation, by the destruction of property and loss of men which resulted from it, was one of the principal causes of their ruin. ^27.4Previously the invasions were short, and did not prevent their enjoying their land during the rest of the time: the enemy was now permanently fixed in Attica; at one time it was an attack in force, at another it was the regular garrison overrunning the country and making forays for its subsistence, and the Lacedaemonian king, Agis, was in the field and diligently prosecuting the war; great mischief was therefore done to the Athenians. ^27.5They were deprived of their whole country: more than twenty thousand slaves had deserted, a great part of them artisans, and all their sheep and beasts of burden were lost; and as the cavalry rode out daily upon excursions to Decelea and to guard the country, their horses were either lamed by being constantly worked upon rocky ground, or wounded by the enemy.

^28.1Besides, the transport of provisions from Euboea, which had before been carried on so much more quickly over land by Decelea from Oropus, was now effected at great cost by sea round Sunium; everything the city required had to be imported from abroad, and instead of a city it became a fortress. ^28.2Summer and winter the Athenians were worn out by having to keep guard on the fortifications, during the day by turns, by night all together, the cavalry excepted, at the different military posts or upon the wall. ^28.3But what most oppressed them was that they had two wars at once, and had thus reached a pitch of frenzy which no one would have believed possible if he had heard of it before it had come to pass. For could any one have imagined that even when besieged by the Peloponnesians entrenched in Attica, they would still, instead of withdrawing from Sicily, stay on there besieging in like manner Syracuse, a town (taken as a town) in no way inferior to Athens, or would so thoroughly upset the Hellenic estimate of their strength and audacity, as to give the spectacle of a people which, at the beginning of the war, some thought might hold out one year, some two, none more than three, if the Peloponnesians invaded their country, now seventeen years after the first invasion, after having already suffered from all the evils of war, going to Sicily and undertaking a new war nothing inferior to that which they already had with the Peloponnesians? ^28.4These causes, the great losses from Decelea, and the other heavy charges that fell upon them, produced their financial embarrassment; and it was at this time that they imposed upon their subjects, instead of the tribute, the tax of a twentieth upon all imports and exports by sea, which they thought would bring them in more money; their expenditure being now not the same as at first, but having grown with the war while their revenues decayed.

^29.1Accordingly, not wishing to incur expense in their present want of money, they sent back at once the Thracians who came too late for Demosthenes, under the conduct of Diitrephes, who was instructed, as they were to pass through the Euripus, to make use of them if possible in the voyage along shore to injure the enemy. ^29.2Diitrephes first landed them at Tanagra and hastily snatched some booty; he then sailed across the Eurious in the evening from Chalcis in Euboea and disembarking in Boeotia led them against Mycalessus. ^29.3The night he passed unobserved near the temple of Hermes, not quite two miles from Mycalessus, and at daybreak assaulted and took the town, which is not a large one; the inhabitants being off their guard and not expecting that any one would ever come up so far from the sea to molest them, the wall too being weak, and in some places having tumbled down, while in others it had not been built to any height, and the gates also being left open through their feeling of security. ^29.4The Thracians bursting into Mycalessus sacked the houses and temples, and butchered the inhabitants, sparing neither youth nor age, but killing all they fell in with, one after the other, children and women, and even beasts of burden, and whatever other living creatures they saw; the Thracian race, like the bloodiest of the barbarians, being ever most so when it has nothing to fear. ^29.5Everywhere confusion reigned and death in all its shapes; and in particular they attacked a boys' school, the largest that there was in the place, into which the children had just gone, and massacred them all. In short, the disaster falling upon the whole town was unsurpassed in magnitude, and unapproached by any in suddenness and in horror.

^30.1Meanwhile the Thebans heard of it and marched to the rescue, and overtaking the Thracians before they had gone far, recovered the plunder and drove them in panic to the Euripus and the sea, where the vessels which brought them were lying. ^30.2The greatest slaughter took place while they were embarking, as they did not know how to swim, and those in the vessels on seeing what was going on on shore moored them out of bowshot: in the rest of the retreat the Thracians made a very respectable defence against the Theban horse, by which they were first attacked, dashing out and closing their ranks according to the tactics of their country, and lost only a few men in that part of the affair. A good number who were after plunder were actually caught in the town and put to death. ^30.3Altogether the Thracians had two hundred and fifty killed out of thirteen hundred, the Thebans and the rest who came to the rescue about twenty, troopers and heavy infantry, with Scirphondas, one of the Boetarchs. The Mycalessians lost a large proportion of their population.