History of the Peloponnesian War

And if the attempt succeeded, and that they once fortified Delium, they easily hoped, though no change followed in the state of the Boeotians for the present, yet being possessed of those places, and by that means continually fetching in prey out of the country, because there was for every one a place at hand to retire unto, that it could not stand long at a stay; but that the Athenians joining with such of them as rebelled, and the Boeotians not having their forces united, they might in time order the state to their own liking. Thus was the plot laid.

And Hippocrates himself, with the forces of the city, was ready when time should serve to march; but sent Demosthenes before with forty galleys to Naupactus, to the end that he should levy an army of Acarnanians and other their confederates in these quarters, and sail to Siphae to receive it by treason. And a day was set down betwixt them on which these things should have been done together.

Demosthenes, when he arrived and found the Oeniades by compulsion of the rest of Acarnania entered into the Athenian confederation and had himself raised all the confederates thereabouts, made war first upon Salynthius and the Agraeans, and having taken in other places thereabouts, stood ready, when the time should require, to go to Siphae.