History of the Peloponnesian War

His soldiers, tired of their inactivity, began also seriously to reflect on the weakness and incompetence of their commander and the skill and valor that would be opposed to him, and on their own original unwillingness to accompany him. These murmurs coming to the ears of Cleon, he resolved not to disgust the army by keeping it in the same place, and broke up his camp and advanced.

The temper of the general was what it had been at Pylos, his success on that occasion having given him confidence in his capacity. He never dreamed of any one coming out to fight him, but said that he was rather going up to view the place; and if he waited for his reinforcements it was not in order to make victory secure in case he should be compelled to engage, but to be enabled to surround and storm the city.