History of the Peloponnesian War

The news of the revolt of the cities quickly reached the Athenians also; and when they learned that troops under Aristeus were also on the way to support the rebels, they sent against the places in revolt two thousand of their own hoplites and forty ships, under Callias son of Calliades with four other generals.

These first came to Macedonia and found that the former thousand had just taken Therme and were besieging Pydna;

so they also took part in the siege of Pydna. But afterwards they concluded an agreement and an alliance with Perdiccas, being forced thereto by the situation of Potidaea and tie arrival of Aristeus, which compelled them to hasten, and then they withdrew from Macedonia.

On their way they came to Beroea and thence to Strepsa,[*](In Mygdonia, north of Therme.) and after an unsuccessful attempt upon this place proceeded overland to Potidaea with three thousand hoplites of their own and with many of their allies besides, and with six hundred Macedonian cavalry, who were under the command of Philip and Pausanias; and at the same time their ships, seventy in number, sailed along the coast.

And marching leisurely they arrived on the third day at Gigonus, and went into camp.