History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And now the measure which I think would be most opportune, but which you on account of your habitual love of ease would be least likely to adopt promptly, shall nevertheless be proposed If we Siceliots—all together, or, in default of this, as many as will join us—were willing to launch all our available naval force and with two months' provisions go to meet the Athenians at Tarentum and the promontory of Iapygia, and make plain to them that the contest will not be first for Sicily, but before that for their passage across the Ionian Sea, we should mightily astound them and force them to reflect that we have as our base a friendly country from which to keep watch and ward—for Tarentum is ready to receive us—whereas for them the open sea is a wide one to cross with all their armament,[*](The Athenians would naturally except to cross from Corcyra to Tarentum, then follow the coast to Messene. By making Tarentum their base the Siceliots would force the Athenians to cross the open sea—a hazardous undertaking.) and it is difficult on account of the length of the voyage to keep in formation; consequently, coming up slowly and few at a time, they would be at the mercy of our attack. But if on the other hand they should lighten their ships and attack with the swift-sailing part of their fleet in a more compact body, then, in case they used their oars, we should set upon them when weary with rowing;
or if it did not seem wise to attack them, we could retire to Tarentum again. They, however, having crossed with slender supplies in the prospect of a naval engagement, would be in distress in uninhabited regions, and either would remain and be blockaded, or trying to sail along the coast would leave behind the rest of their equipment, and, having no certainty as to the temper of the cities, whether they would receive them or not, would be discouraged.