History of the Peloponnesian War

But when the envoys to Athens returned without having accomplished anything, the people of Mytilene and the rest of Lesbos, except Methymna, began war; the Methymnaeans, however, supported the Athenians, as did also the Imbrians, Lemnians, and a few of the other allies.

The Mytilenaeans made a sortie in full force against the camp of the Athenians, and a battle occurred in which the Mytilenaeans had the advantage; nevertheless they did not have enough confidence in themselves to bivouack on the field, but withdrew. From this time on they kept quiet, being unwilling to risk an engagement without reinforcements from Peloponnesus and elsewhere. Such reinforcements they expected, for there had come to them Meleas a Laconian and Hermaeondas a Theban, who had been sent out before the revolt, but being unable to arrive before the Athenian expedition, had sailed in secretly after the battle in a trireme, and now advised them to send a second trireme and some envoys to accompany them. And this the Mytilenaeans did.