History of the Peloponnesian War

This action falling out at Plataea and the peace now clearly dissolved, the Athenians prepared themselves for war; so also did the Lacedaemonians and their confederates, intending on either part to send ambassadors to the king and to other barbarians, wheresoever they had hope of succours, and contracting leagues with such cities as were not under their own command.

The Lacedaemonians besides those galleys which they had in Italy and Sicily, of the cities that took part with them there, were ordered to furnish, proportionably to the greatness of their several cities, so many more as the whole number might amount to five hundred sail and to provide a sum of money assessed, and in other things not to stir farther but to receive the Athenians coming but with one galley at once till such time as the same should be ready.

The Athenians, on the other side, surveyed their present confederates and sent ambassadors to those places that lay about Peloponnesus, as Corcyra, Cephalonia, Acarnania, and Zacynthus, knowing that as long as these were their friends, they might with the more security make war round about upon the coast of Peloponnesus.