Soon afterwards there arrived an Athenian reinforcement of a thousand hoplites and three1
hundred horse, under the command of Laches and Nicostratus. The Argives, although dissatisfied with the truce, were reluctant to break it, so they bade them depart; and, when they desired to treat, they would not present them to the assembly until they were compelled by the importunity of their Mantinean and Elean allies, who had not yet left Argos.
The Athenians then, speaking by the mouth of their ambassador Alcibiades, told the Argives in the presence of the rest that they had no right to make the truce at all independently of their allies, and that, the Athenians having arrived at the opportune moment, they should fight at once.
The allies were convinced, and they all, with the exception of the Argives, immediately marched against Orchomenus in Arcadia; the Argives, though consenting, did not join them at first, but they came afterwards.
The united forces then sat down before Orchomenus, which they assailed repeatedly; they were especially anxious to get the place into their hands, because certain Arcadian hostages had been deposited there by the Lacedaemonians.
The Orchomenians, considering the weakness of their fortifications and the numbers of the enemy, and beginning to fear that they might perish before any one came to their assistance, agreed to join the alliance: they were to give hostages of their own to the Mantineans, and to deliver up those whom the Lacedaemonians had deposited with them.