 According to an account by Polyaenus, the Spartan army commanded by Ischolaus was besieged by the Athenian army under Chabrias in the city of Drys.When the Athenians approached with battering rams to try to knock down the city wall, Ischolaus' defense consisted in getting ahead of him and demolishing part of the wall so that his soldiers fought with more courage for not having the protection of the wall and also to show the Athenians their contempt for siege engines.The Athenians, frightened at the voluntary demolition of the walls, did not dare to attack the city.