History of the Peloponnesian War

In the middle of the next summer, when the Lacedaemonians saw that the Epidaurians, who were their allieswere in distress, and that the other states in the Peloponnese had either separated from them, or were unfavourably disposed towards them; thinking that if they did not quickly prevent it, they would proceed to a greater degree of disaffection, they marched with all their forces, themselves and the helots, against Argos, under the command of Agis son of Archidamus, king of the Lacedaemonians.

They were accompanied by the Tegeans, and as many others of the Arcadians as were in alliance with them. The allies in the rest of the Peloponnese also, and those beyond it, mustered at Phlius; the Boeotians with five thousand heavy-armed, the same number of light-armed, five hundred cavalry, and an equal number of [*]( i. e. light infantry who accompanied the cavalry into action See Poppo's note.) hamippi; the Corinthians with two thousand heavy-armed; the rest as might severally happen; but the Phliasians in full force, as the army was posted in their country.