History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
But now the Athenians, setting out from Argos with thirty ships,[*](cf. 1.) had ravaged a part of Epidaurus and Prasiae and other places, and at the same time were making predatory excursions from Pylos; and as often as differences arose about any of the points of dispute in the treaty and the Lacedaemonians proposed arbitration, they were unwilling to resort to it; at this time, therefore, the Lacedaemonians, considering that the unlawful conduct, of which they had themselves formerly been guilty, had shifted round and now rested upon the Athenians, were zealous for the war.
And during this winter they sent out requisitions for iron to their allies, and in general were making ready the tools needed in the fortification of Deceleia. And at the same time they were not only devising on their own part ways and means for sending reinforcements in merchant-ships to the army in Sicily, but were also compelling the rest of the Peloponnesians to do likewise. So the winter ended, and with it the eighteenth year of this war of which Thucydides wrote the history.
At the very beginning of the next spring,[*](March, 413 B.C.) earlier than ever before, the Lacedaemonians and their allies invaded Attica, under the command of Agis son of Archidamus, king of the Lacedaemonians. And at first they ravaged the plain of Attica and then proceeded to fortify Deceleia,[*](Situated almost due north of Athens, at the highest point of the pass where the road to Boeotia cuts through the eastern Parnes, the site of the present village of Tatoï.) apportioning the work to the several allied states.
Deceleia is distant from the city of Athens about one hundred and twenty stadia, and about the same distance, or not much more, from Boeotia. The purpose of the fort they were building was to dominate the plain and the most fertile parts of the country, with a view to devastating them, and it was visible as far as the city of Athens.
And while the Peloponnesians in Attica and their allies were building this fort, those in the Peloponnesus were at the same time despatching the hoplites in merchant-ships to Sicily, the Lacedaemonians having picked out the best of the Helots and Neodamodes,[*](cf. v. xxxiv. 1. These were clans of new citizens made up of Helots emancipated for service in war.) of both together about six hundred hoplites, with Eccritus the Spartan as commander, and the Boeotians having selected three hundred hoplites, in command of whom were Xenon and Nicon, both Thebans, and Hegesander, a Thespian.