History of the Peloponnesian War

The thirty ships of the Athenians, arriving before the Thracian places, found Potidaea and the rest in revolt.

Their commanders considering it to be quite impossible with their present force to carry on war with Perdiccas, and with the confederate towns as well, turned to Macedonia, their original destination, and having established themselves there, carried on war in co-operation with Philip, and the brothers of Derdas, who had invaded the country from the interior.