178a-181d Introduction
181e-182d Nicias states his position
182d-183e Laches states his position
183e-187b Socrates takes over

184d-185b Argument from expert
185b-e Definition of the subject in which expertise is sought
186a-187d Need for proven teachers; Socrates' disavowal
187d-189d Reactions of Nicias and Laches to Socrates' proposals