History of the Peloponnesian War

Such were the words of the Mitylenians. After hearing them out, the Lacedaemonians and confederates granted what they urged, and took the Lesbians into alliance, and deciding in favour of the invasion of Attica, told the allies present to march as quickly as possible to the Isthmus with two-thirds of their forces; and arriving there first themselves, got ready hauling machines to carry their ships across from Corinth to the sea on the side of Athens, in order to make their attack by sea and land at once.

However, the zeal which they displayed was not imitated by the rest of the confederates, who came in but slowly, being engaged in harvesting their corn and sick of making expeditions.

Meanwhile the Athenians, aware that the preparations of the enemy were due to his conviction of their weakness, and wishing to show him that he was mistaken, and that they were able, without moving the Lesbian fleet, to repel with ease that with which they were menaced from Peloponnese, manned a hundred ships by embarking the citizens of Athens, except the knights and Pentecosiomedimni, and the resident aliens; and putting out to the Isthmus, displayed their power, and made descents upon Peloponnese wherever they pleased.