History of the Peloponnesian War

To the Athenians too came immediately the tidings of the cities having revolted; and when they found that the forces with Aristeus had gone there besides, they sent two thousand heavy-armed of their own men and forty slips to the revolted towns, with Callias, the son of Calliades, as general with four others;

who, on arriving in Macedonia first, found that the former thousand had just taken Therme, and were besieging Pydna.

So they also sat down before Pydna, and besieged it; but afterwards, having made terms and a compulsory alliance [*]( i. e. which they only made because they could not help it. Compare II. 70. 1, βρώσεως πέρι ἀναγκαίας Food which none but a starving man would eat. —Arnold) with Perdiccas, as they were hurried on by Potidaea and the arrival of Aristeus there, they withdrew from Macedonia;

and having gone to Beroea, and thence turned again [to the coast], (after first attempting the place without taking it,) they continued their march by land to Potidaea, with three thousand heavy-armed of their own, and many of the allies besides, and six hundred horse of the Macedonians with Philip and Pausanias. At the same time seventy ships were sailing in a line with them.

And advancing by short marches, they arrived at Gigonus, and pitched their camp.