History of the Peloponnesian War

And they arrived in Thrace the fortieth day after Potidaea had revolted.

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.