History of the Peloponnesian War

And I remember yet that from the very beginning of this war and so on till the end it was uttered by many that it should be of thrice nine years' continuance.

And for the time thereof I lived in my strength and applied my mind to gain an accurate knowledge of the same. It happened also that I was banished my country for twenty years, after my charge at Amphipolis; whereby being present at the affairs of both, and especially of the Lacedaemonians by reason of my exile, I could at leisure the better learn the truth of all that passed.

The quarrels, therefore, and perturbations of the peace, after those ten years, and that which followed, according as from time to time the war was carried, I will now pursue.

After the concluding of the fifty years' peace and the league which followed, and when those ambassadors which were sent for out of the rest of Peloponnesus to accept the said peace were departed from Lacedaemon, the Corinthians (the rest going all to their own cities), turning first to Argos, entered into treaty with some of the Argive magistrates to this purpose:

that the Lacedaemonians having made a peace and league with the Athenians, their hitherto mortal enemies, tending not to the benefit, but to the enslaving of Peloponnesus, it behoved them to consider of a course for the safety of the same, and to make a decree that any city of the Grecians that would, and were a free city, and admitted the like and equal trials of judgment with theirs, might make a league with the Argives for the one mutually to aid the other; and to assign them a few men, with absolute authority from the state, to treat with; and that it should not be motioned to the people, to the end that, if the multitude would not agree to it, it might be unknown that ever they had made such a motion; affirming that many would come into this confederacy upon hatred to the Lacedaemonians.

And the Corinthians, when they had made this overture, went home.