History of the Peloponnesian War

Shortly afterwards ambassadors appeared from Argos with the proposals indicated; and the Boeotarchs approved of the terms and dismissed the ambassadors with a promise to send envoys to Argos to negotiate the alliance.

In the meantime it was decided by the Boeotarchs, the Corinthians, the Megarians, and the envoys from Thrace first to interchange oaths together to give help to each other whenever it was required and not to make war or peace except in common; after which the Boeotians and Megarians, who acted together, should make the alliance with Argos.