The Epidaurians were reinforced about the end of September by a detachment of three hundred Lacedæmonian hoplites under Agesippidas, sent by sea without the knowledge of the Athenians. Of this, the Argeians preferred loud complaints at Athens; and they had good reason to condemn the negligence of the Athenians as allies, for not having kept better naval watch at their neighboring station of Ægina, and for having allowed this enemy to enter the harbor of Epidaurus. But they took another ground of complaint, somewhat remarkable. In the alliance between Athens, Argos, Elis, and Mantineia, it had been stipulated that neither of the four should suffer the passage of troops through its territory, without the joint consent of all. Now the sea was accounted a part of the territory of Athens: so that the Athenians had violated this article of the treaty by permitting the Lacedæmonians to send troops by sea to Epidaurus. And the Argeians now required Athens, in compensation for this wrong, to carry back the Messenians and Helots from Kephallenia to Pylos, and allow them to ravage Laconia. The Athenians, under the persuasion of Alkibiadês, complied with their requisition; inscribing, at the foot of the pillar on which their alliance with Sparta stood recorded, that the Lacedæmonians had not observed their oaths. Nevertheless, they still abstained from formally throwing up their treaty with Lacedæmon, or breaking it in any other way.[101] The relations between Athens and Sparta thus remained in name, peace and alliance, so far as concerns direct operations against each other’s territory; in reality, hostile action as well as hostile manœuvring, against each other, as allies respectively of third parties.
The Argeians, after having prolonged their incursions on the Epidaurian territory throughout all the autumn, made in the winter an unavailing attempt to take the town itself by storm. Though there was no considerable action, but merely a succession of desultory attacks, in some of which the Epidaurians even had the advantage, yet they still suffered serious hardship, and pressed their case forcibly on the sympathy of Sparta. Thus importuned, and mortified as well as alarmed by the increasing defection or coldness which they now experienced throughout Peloponnesus, the Lacedæmonians determined during the course of the ensuing summer to put forth their strength vigorously, and win back their lost ground.[102]
Towards the month of June (B.C. 418) they marched with their full force, freemen as well as Helots, under king Agis, against Argos. The Tegeans and other Arcadian allies joined them on the march, while their other allies near the Isthmus,—Bœotians, Megarians, Corinthians, Sikyonians, Phliasians, etc., were directed to assemble at Phlius. The number of these latter allies were very considerable, for we hear of five thousand Bœotian hoplites, and two thousand Corinthian: the Bœotians had with them also five thousand light-armed, five hundred horsemen, and five hundred foot-soldiers, who ran alongside of the horsemen. The numbers of the rest, or of Spartans themselves, we do not know; nor probably did Thucydidês himself know: for we find him remarking elsewhere the impenetrable concealment of the Lacedæmonians on all public affairs, in reference to the numbers at the subsequent battle of Mantineia. Such muster of the Lacedæmonian alliance was no secret to the Argeians, who marching first to Mantineia, and there taking up the force of that city as well as three thousand Eleian hoplites who came to join them, met the Lacedæmonians in their march at Methydrium in Arcadia. The two armies being posted on opposite hills, the Argeians had resolved to attack Agis the next day, so as to prevent him from joining his allies at Phlius. But he eluded this separate encounter by decamping in the night, reached Phlius, and operated his junction in safety. We do not hear that there was in the Lacedæmonian army any commander of lochus, who, copying the unreasonable punctilio of Amompharetus before the battle of Platæa, refused to obey the order of retreat before the enemy, to the imminent risk of the whole army. And the fact, that no similar incident occurred now, may be held to prove that the Lacedæmonians had acquired greater familiarity with the exigencies of actual warfare.
As soon as the Lacedæmonian retreat was known in the morning, the Argeians left their position also, and marched with their allies, first to Argos itself; next, to Nemea, on the ordinary road from Corinth and Phlius to Argos, by which they imagined that the invaders would approach. But Agis acted differently. Distributing his force into three divisions, he himself with the Lacedæmonians and Arcadians, taking a short, but very rugged and difficult road, crossed the ridge of the mountains and descended straight into the plain near Argos. The Corinthians, Pellenians, and Phliasians, were directed to follow another mountain road, which entered the same plain upon a different point; while the Bœotians, Corinthians, and Sikyonians, followed the longer, more even, and more ordinary route, by Nemea. This route, though apparently frequented and convenient, led for a considerable distance along a narrow ravine, called the Trêtus, bounded on each side by mountains. The united army under Agis was much superior in number to the Argeians: but if all had marched in one line by the frequented route through the narrow Trêtus, their superiority of number would have been of little use, whilst the Argeians would have had a position highly favorable to their defence. By dividing his force, and taking the mountain road with his own division, Agis got into the plain of Argos in the rear of the Argeian position at Nemea. He anticipated that when the Argeians saw him devastating their properties near the city, they would forthwith quit the advantageous ground near Nemea, to come and attack him in the plain: the Bœotian division would thus find the road by Nemea and the Trêtus open, and would be able to march without resistance into the plain of Argos, where their numerous cavalry would act with effect against the Argeians engaged in attacking Agis. This triple march was executed. Agis with his division, and the Corinthians with theirs, got across the mountains into the Argeian plain during the night; while the Argeians,[103] hearing at daybreak that he was near their city, ravaging Saminthus and other places, left their position at Nemea to come down to the plain and attack him. In their march they had a partial skirmish with the Corinthian division, which had reached a high ground immediately above the Argeian plain, and which lay nearly in the road. But this affair was indecisive, and they soon found themselves in the plain near to Agis and the Lacedæmonians, who lay between them and their city.
On both sides, the armies were marshalled, and order taken for battle. But the situation of the Argeians was in reality little less than desperate: for while they had Agis and his division in their front, the Corinthian detachment was near enough to take them in flank, and the Bœotians marching along the undefended road through the Trêtus would attack them in the rear. The Bœotian cavalry too would act with full effect upon them in the plain, since neither Argos, Elis, nor Mantineia, seemed to have possessed any horsemen; a description of force which ought to have been sent from Athens, though from some cause which does not appear, the Athenian contingent had not yet arrived. Nevertheless, in spite of this very critical position, both the Argeians and their allies were elate with confidence and impatient for battle; thinking only of the division of Agis immediately in their front, which appeared to be inclosed between them and their city, and taking no heed to the other formidable enemies in their flank and rear. But the Argeian generals were better aware than their soldiers of the real danger; and just as the two armies were about to charge, Alkiphron, proxenus of the Lacedæmonians at Argos, accompanied Thrasyllus, one of the five generals of the Argeians, to a separate parley with Agis, without the least consultation or privity on the part of their own army. They exhorted Agis not to force on a battle, assuring him that the Argeians were ready both to give and receive equitable satisfaction, in all matters of complaint which the Lacedæmonians might urge against them, and to conclude a just peace for the future. Agis, at once acquiescing in the proposal, granted them a truce of four months to accomplish what they had promised. He on his part also took this step without consulting either his army or his allies, simply addressing a few words of confidential talk to one of the official Spartans near him. Immediately, he gave the order for retreat, and the army, instead of being led to battle, was conducted out of the Argeian territory, through the Nemean road whereby the Bœotians had just been entering. But it required all the habitual discipline of Lacedæmonian soldiers to make them obey this order of the Spartan king, alike unexpected and unwelcome.[104] For the army were fully sensible both of the prodigious advantages of their position, and of the overwhelming strength of the invading force, so that all the three divisions were loud in their denunciations of Agis, and penetrated with shame at the thoughts of so disgraceful a retreat. And when they all saw themselves in one united body at Nemea, previous to breaking up and going home,—so as to have before their eyes their own full numbers and the complete equipment of one of the finest Hellenic armies which had ever been assembled,—the Argeian body of allies, before whom they were now retiring, appeared contemptible in the comparison, and they separated with yet warmer and more universal indignation against the king who had betrayed their cause.
On returning home, Agis incurred not less blame from the Spartan authorities than from his own army, for having thrown away so admirable an opportunity of subduing Argos. This was assuredly no more than he deserved: but we read with no small astonishment that the Argeians and their allies on returning were even more exasperated against Thrasyllus,[105] whom they accused of having traitorously thrown away a certain victory. They had indeed good ground, in the received practice, to censure him for having concluded a truce without taking the sense of the people. It was their custom on returning from a march, to hold a public court-martial before entering the city, at a place called the Charadrus, or winter torrent near the walls, for the purpose of adjudicating on offences and faults committed in the army. Such was their wrath on this occasion against Thrasyllus, that they would scarcely be prevailed upon even to put him upon his trial, but began to stone him. He was forced to seek personal safety at the altar; upon which the soldiers tried him, and he was condemned to have his property confiscated.[106]
Very shortly afterwards the expected Athenian contingent arrived, which probably ought to have come earlier: one thousand hoplites, with three hundred horsemen, under Lachês and Nikostratus. Alkibiadês came as ambassador, probably serving as a soldier also among the horsemen. The Argeians, notwithstanding their displeasure against Thrasyllus, nevertheless felt themselves pledged to observe the truce which he had concluded, and their magistrates accordingly desired the newly-arrived Athenians to depart. Nor was Alkibiadês even permitted to approach and address the public assembly, until the Mantineian and Eleian allies insisted that thus much at least should not be refused. An assembly was therefore convened, in which these allies took part, along with the Argeians. Alkibiadês contended strenuously that the recent truce with the Lacedæmonians was null and void; since it had been contracted without the privity of all the allies, distinctly at variance with the terms of the alliance. He therefore called upon them to resume military operations forthwith, in conjunction with the reinforcement now seasonably arrived. His speech so persuaded the assembly, that the Mantineians and Eleians consented at once to join him in an expedition against the Arcadian town of Orchomenus; the Argeians, also, though at first reluctant, very speedily followed them thither. Orchomenus was a place important to acquire, not merely because its territory joined that of Mantineia on the northward, but because the Lacedæmonians had deposited therein the hostages which they had taken from Arcadian townships and villages as guarantee for fidelity. Its walls were however in bad condition, and its inhabitants, after a short resistance, capitulated. They agreed to become allies of Mantineia, to furnish hostages for faithful adhesion to such alliance, and to deliver up the hostages deposited with them by Sparta.[107]
Encouraged by first success, the allies debated what they should next undertake; the Eleians contending strenuously for a march against Lepreum, while the Mantineians were anxious to attack their enemy and neighbor Tegea. The Argeians and Athenians preferred the latter, incomparably the more important enterprise of the two: but such was the disgust of the Eleians at the rejection of their proposition, that they abandoned the army altogether, and went home. Notwithstanding their desertion, however, the remaining allies continued together at Mantineia, organizing their attack upon Tegea, in which city they had a strong favorable party, who had actually laid their plans, and were on the point of proclaiming the revolt of the city from Sparta,[108] when the philo-Laconian Tegeans just saved themselves by despatching the most urgent message to Sparta, and receiving the most rapid succor. The Lacedæmonians, filled with indignation at the news of the surrender of Orchomenus, vented anew all their displeasure against Agis, whom they now threatened with the severe punishment of demolishing his house and fining him in the sum of one hundred thousand drachmæ, or about twenty-seven and two-thirds Attic talents. He urgently entreated that an opportunity might be afforded to him of redeeming by some brave deed the ill name which he had incurred: if he failed in doing so, then they might inflict on him what penalty they chose. The penalty was accordingly withdrawn: but a restriction, new to the Spartan constitution, was now placed upon the authority of the king. It had been before a part of his prerogative to lead out the army single-handed and on his own authority; but a council of ten was now named, without whose concurrence he was interdicted from exercising such power.[109]
To the great good fortune of Agis, a pressing message now arrived announcing the imminent revolt of Tegea, the most important ally of Sparta, and close upon her border. Such was the alarm occasioned by this news that the whole military population instantly started off to relieve the place, Agis at their head, the most rapid movement ever known to have been made by Lacedæmonian soldiers.[110] When they arrived at Orestheium in Arcadia, in their way, perhaps hearing that the danger was somewhat less pressing, they sent back to Sparta one-sixth part of the forces, for home defence, the oldest as well as the youngest men. The remainder marched forward to Tegea, where they were speedily joined by their Arcadian allies. They farther sent messages to the Corinthians and Bœotians, as well as to the Phocians and Lokrians, invoking the immediate presence of these contingents in the territory of Mantineia. The arrival of such reinforcements, however, even with all possible zeal on the part of the cities contributing, could not be looked for without some lapse of time; the rather, as it appears, that they could not get into the territory of Mantineia except by passing through that of Argos,[111] which could not be safely attempted until they had all formed a junction. Accordingly Agis, impatient to redeem his reputation, marched at once with the Lacedæmonians and the Arcadian allies present, into the territory of Mantineia, and took up a position near the Herakleion, or temple of Hêraklês,[112] from whence he began to ravage the neighboring lands. The Argeians and their allies presently came forth from Mantineia, planted themselves near him, but on very rugged and impracticable ground, and thus offered him battle. Nothing daunted by the difficulties of the position, he marshalled his army and led it up to attack them. His rashness on the present occasion might have produced as much mischief as his inconsiderate concession to Thrasyllus near Argos, had not an ancient Spartan called out to him that he was now merely proceeding “to heal mischief by mischief.” So forcibly was Agis impressed either with this timely admonition, or by the closer view of the position which he had undertaken to assault, that he suddenly halted the army and gave orders for retreat, though actually within distance no greater than the cast of a javelin from the enemy.[113]
His march was now intended to draw the Argeians away from the difficult ground which they occupied. On the frontier between Mantineia and Tegea—both situated on a lofty but inclosed plain, drained only by katabothra, or natural subterranean channels in the mountains—was situated a head of water, the regular efflux of which seems to have been kept up by joint operations of both cities for their mutual benefit. Thither Agis now conducted his army, for the purpose of turning the water towards the side of Mantineia, where it would occasion serious damage; calculating that the Mantineians and their allies would certainly descend from their position to hinder it. No stratagem however was necessary to induce the latter to adopt this resolution. For so soon as they saw the Lacedæmonians, after advancing to the foot of the hill, first suddenly halt, next retreat, and lastly disappear, their surprise was very great: and this surprise was soon converted into contemptuous confidence and impatience to pursue the flying enemy. The generals not sharing such confidence, hesitated at first to quit their secure position: upon which the troops became clamorous, and loudly denounced them for treason in letting the Lacedæmonians quietly escape a second time, as they had before done near Argos. These generals would probably not be the same with those who had incurred, a short time before, so much undeserved censure for their convention with Agis: but the murmurs on the present occasion, hardly less unreasonable, drove them, not without considerable shame and confusion, to give orders for advance. They abandoned the hill, marched down into the plain so as to approach the Lacedæmonians, and employed the next day in arranging themselves in good battle order, so as to be ready to fight at a moment’s notice.