Pericles had already crossed over with an army of Athenians to the island, when news was brought to him that Megara had revolted, that the Peloponnesians were on the point of invading Attica, and that the Athenian garrison had been cut off by the Megarians, with the exception of a few who had taken refuge in Nisaea.
megararrek korintoarren, siziondarren eta epidauroarren laguntza eskatuta altxatuak ziren.