History of the Peloponnesian War

But the Chalcidians were also very anxious to have him, as a man who both appeared, while in Sparta, to be active in every thing, and after he had gone from home, proved himself most valuable to the Lacedaemonians.

For at that present time, by showing himself just and moderate towards the cities, he caused their revolt in most instances; while other places he took through their being betrayed to him; so that the Lacedaemonians, if they might wish to conclude peace, (as they did,) had towns to give and receive back, and a respite from the war in the Peloponnese. And at a later period of the war, after what had happened in Sicily, it was the probity and tact of Brasidas at this time, experienced by some and heard of by others, that most raised amongst the allies of Athens a strong inclination towards the Lacedaemonians.

For by going out first, and showing himself to be in all respects a worthy man, he left amongst them an assured hope that the rest also were like him.