History of the Peloponnesian War

There was also amongst them much dejection and depreciation of their own strength. For they resembled nothing but a city starved out and attempting to escape; and no small one too, for of their whole multitude there were not less than forty thousand on the march. Of these, all the rest took whatever each one could that was useful, and the heavy-armed and cavalry themselves, contrary to custom, carried their own food under their arms, some for want of servants, others through distrusting them; for they had for a long time been deserting, and did so in greatest numbers at that moment. And even what they carried was not sufficient; for there was no longer any food in the camp.