The Argives who made these statements did so upon their own authority, not by order of the people, and Agis on his accepted their proposals, and without himself either consulting the majority, simply communicated the matter to a single individual, one of the high officers accompanying the expedition, and granted the Argives a truce for four months, in which to fulfil their promises; after which he immediately led off the army without giving any explanation to any of the other allies. The Lacedaemonians and allies followed their general out of respect for the law, but amongst themselves loudly blamed Agis for going away from so fair a field (the enemy being hemmed in on every side by infantry and cavalry) without having done anything worthy of their strength. Indeed this was by far the finest Hellenic army ever yet brought together; and it should have been seen while it was still united at Nemea, with the Lacedaemonians in full force, the Arcadians, Boeotians, Corinthians, Sicyonians, Pellenians, Phliasians and Megarians, and all these the flower of their respective populations, thinking themselves a match not merely for the Argive confederacy, but for another such added to it. The army thus retired blaming Agis, and returned every man to his home. The Argives however blamed still more loudly the persons who had concluded the truce without consulting the people, themselves thinking that they had let escape with the Lacedaemonians an opportunity such as they should never see again; as the struggle would have been under the walls of their city, and by the side of many and brave allies. On their return accordingly they began to stone Thrasylus in the bed of the Charadrus, where they try all military causes before entering the city. Thrasylus fled to the altar, and so saved his life; his property however they confiscated.
After this arrived a thousand Athenian heavy infantry and three hundred horse, under the command of Laches and Nicostratus; whom the Argives, being nevertheless loath to break the truce with the Lacedaemonians, begged to depart, and refused to bring before the people, to whom they had a communication to make, until compelled to do so by the entreaties of the Mantineans and Eleans, who were still at Argos. The Athenians, by the mouth of Alcibiades their ambassador there present, told the Argives and the allies that they had no right to make a truce at all without the consent of their fellow confederates, and now that the Athenians had arrived so opportunely the war ought to be resumed. These arguments proving successful with the allies, they immediately marched upon Orchomenos, all except the Argives, who, although they had consented like the rest, stayed behind at first, but eventually joined the others. They now all sat down and besieged Orchomenos, and made assaults upon it; one of their reasons for desiring to gain this place being that hostages from Arcadia had been lodged there by the Lacedaemonians. The Orchomenians, alarmed at the weakness of their wall and the numbers of the enemy, and at the risk they ran of perishing before relief arrived, capitulated upon condition of joining the league, of giving hostages of their own to the Mantineans, and giving up those lodged with them by the Lacedaemonians. Orchomenos thus secured, the allies now consulted as to which of the remaining places they should attack next.
The Eleans were urgent for Lepreum; the Mantineans for Tegea; and the Argives and Athenians giving their support to the Mantineans, the Eleans went home in a rage at their not having voted for Lepreum; while the rest of the allies made ready at Mantinea for going against Tegea, which a party inside had arranged to put into their hands.
Meanwhile the Lacedaemonians, upon their return from Argos after concluding the four months' truce, vehemently blamed Agis for not having subdued Argos, after an opportunity such as they thought they had never had before; for it was no easy matter to bring so many and so good allies together. But when the news arrived of the capture of Orchomenos, they became more angry than ever, and, departing from all precedent, in the heat of the moment had almost decided to raze his house, and to fine him ten thousand drachmae. Agis however entreated them to do none of these things, promising to atone for his fault by good service in the field, failing which they might then do to him whatever they pleased; and they accordingly abstained from razing his house or fining him as they had threatened to do, and now made a law, hitherto unknown at Lacedaemon, attaching to him ten Spartans as counsellors, without whose consent he should have no power to lead an army out of the city.
At this juncture arrived word from their friends in Tegea that, unless they speedily appeared, Tegea would go over from them to the Argives and their allies, if it had not gone over already. Upon this news a force marched out from Lacedaemon, of the Spartans and Helots and all their people, and that instantly and upon a scale never before witnessed. Advancing to Orestheum in Maenalia, they directed the Arcadians in their league to follow close after them to Tegea, and, going on themselves as far as Orestheum, from thence sent back the sixth part of the Spartans, consisting of the oldest and youngest men, to guard their homes, and with the rest of their army arrived at Tegea; where their Arcadian allies soon after joined them. Meanwhile they sent to Corinth, to the Boeotians, the Phocians, and Locrians, with orders to come up as quickly as possible to Mantinea. These had but short notice; and it was not easy except all together, and after waiting for each other, to pass through the enemy's country, which lay right across and blocked up the line of communication. Nevertheless they made what haste they could. Meanwhile the Lacedaemonians with the Arcadian allies that had joined them, entered the territory of Mantinea, and encamping near the temple of Heracles began to plunder the country.