History of the Peloponnesian War

But when siege was laid to Potidaea they did not take it quietly, not only because Corinthians were in the town, but also because they were in fear about the place; and they immediately summoned the allies to Lacedaemon and, once there, they proceeded to inveigh against the Athenians on the ground that they had broken the treaty and were wronging the Peloponnesus.