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 it would be shameful to be forced to return home, or later to send for fresh supplies, because we had made our plans at first without due consideration. So we must start from home with an adequate armament, realizing that we are about to sail, not only far from our own land, but also on a campaign that will be carried on under no such conditions as if you had gone against an enemy as allies of your subject-states over here, where it would be easy to get whatever further supplies you needed from the friendly territory; nay, you will have removed into an utterly alien land, from which during the winter it is not easy for a messenger to come even in four months.