History of the Peloponnesian War

[On the other side], the Athenians were to seize on Delium, a place consecrated to Apollo in the territory of Tanagra, on the part toward Euboea. All this ought to have been done together upon a day appointed, to the end that the Boeotians might not oppose them with their forces united, but might be troubled every one to defend his own.

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.