History of the Peloponnesian War

After this, the Peloponnesians, desiring to aid the Aeginetae, sent over into Aegina itself three hundred men of arms of the same that had before aided the Corinthians and Epidaurians and with other forces seized on the top of Geraneia. And the Corinthians and their confederates came down from thence into the territory of Megara, supposing that the Athenians, having much of their army absent in Aegina and in Egypt, would be unable to aid the Megareans or, if they did, would be forced to rise from before Aegina.

But the Athenians stirred not from Aegina; but those that remained at Athens, both young and old, under the conduct of Myronides went to Megara;