History of the Peloponnesian War

but the Corinthians repaired to Argos, and in the first place held communications with some of the Argives who were in office, to the effect that, since the Lacedaemonians, not for the good, but for the subjugation of the Peloponnese, had entered into treaty and alliance with the Athenians, who were before their bitterest enemies; the Argives ought to consider how the Peloponnese might be preserved; and to pass a decree, that any city of the Greeks that wished, being independent, and giving judicial satisfaction for wrongs, on fair and equal terms, might enter into alliance with the Argives, on condition of defending each other's country: and that they should appoint a few persons as commissioners with full powers, instead of the discussion of the measure being held before the people; in order that those might not be known who had failed to persuade the multitude. And they asserted that many would come over to them for hatred of the Lacedaemonians.

The Corinthians then, having suggested these things, returned home.

When those of the Argives who heard their proposals had reported them to the government and the people, the Argives passed the decree, and chose twelve men, with whom any one of the Greeks who wished should conclude an alliance, except the Athenians and Lacedaemonians, neither of whom should have liberty to enter into treaty without the consent of the Argive people.