History of the Peloponnesian War

For by showing himself at that present just and moderate towards the cities, he caused the most of them to revolt; and some of them he also took by treason. Whereby it came to pass that if the Lacedaemonians pleased to come to composition (as also they did), they might have towns to render and receive reciprocally. And also long after, after the Sicilian war, the virtue and wisdom which Brasidas showed now, to some known by experience, by others believed upon from report, was the principal cause that made the Athenian confederates affect the Lacedaemonians.

For being the first that went out, and esteemed in all points for a worthy man, he left behind him an assured hope that the rest also were like him.

Being now come into Thrace, the Athenians upon notice thereof declared Perdiccas an enemy, as imputing to him this expedition, and reinforced the garrisons in the parts thereabouts.