History of the Peloponnesian War

And Perdiccas persuaded the Chalcidians to abandon and throw down their cities on the sea, and remove inland to Olynthus, and make that one city a place of strength for themselves. And to those who abandoned them he gave a part of his own territory in Mygdonia, round lake Bolbe, to enjoy as long as the war with the Athenians lasted. And so, throwing down their cities, they removed inland, and prepared for war.

The thirty ships of the Athenians arrived at the Thraceward towns, and found Potidaea and the rest in revolt:

and the generals thinking it impossible with their present force to carry on war both with Philip and the revolted towns, turned their attention to Macedonia, the object for which they were first sent out; and having established themselves there, [*]( i. e. Quum eo venissent, castra posuissent. —Bauer as quoted by Göller. Or it may mean no more than having set to, as in the passages quoted in the note on chap. 49. 3.) carried on the war in conjunction with Philip and the brothers of Derdas, who had invaded the country with an army from the interior.