History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
and that if the Syracusans would come with all their force early in the morning of an appointed day to attack their armament, the Catanians would close the gates on the men who were with them, and would fire their ships; while the Syracusans would easily take [*](τὸ στράτευμα.] I see no reason at all for altering this, as Arnold proposes, into τῷ στρατεύματι; as it evidently refers to all the other forces of the Athenians left behind in their camp, in opposition to the heavy infantry represented as being in the town. Compare 63. 3, where the term is undoubtedly used with reference to the encampment of the Athenians.) the armament by an attack on their stockade. There were many too of the Catanians, he said, who would co-operate with them in this, and were already prepared to do so; namely, the party from which he had himself come.
The generals of the Syracusans, besides feeling confident in other respects, and intending, even without this, to make their preparations for marching to Catana, gave far too inconsiderate credence to the man, and immediately fixing a day on which they would be there, dismissed him; while they themselves (for by this time the Selinuntines and some other of their allies had also come) gave orders for all the Syracusans to march forth in a body. When their preparations were made, and the time at which they had agreed to come was near at hand, they set out for Catana, and bivouacked on the river Symaethus, in the Leontine territory.
The Athenians, on learning their approach, took the whole of their own force, with such of the Sicels, or any other people, as had joined them, and putting them on board their ships and boats, sailed by night to Syracuse.
And thus, when the morning came, the Athenians were landing on the ground opposite the Olympieum, for the purpose of securing their camp; and at the same time the Syracusan cavalry, having ridden up first to Catana, and found that the whole armament had put to sea, returned and carried the news to the infantry, when they all turned back together, and went to the aid of the city.