It took place at Aeginium not far from the source of the Peneius. The first Thessalian town before which the now united army appeared, Gomphi, closed its gates against it; it was quickly stormed and given up to pillage, and the other towns of Thessaly terrified by this example submitted, so soon as Caesar's legions merely appeared before the walls. Amidst these marches and conflicts, and with the help of the supplies - albeit not too ample - which the region on the Peneius afforded, the traces and recollections of the calamitous days through which they had passed gradually vanished.
The victories of Dyrrhachium had thus borne not much immediate fruit for the victors. Pompeius with his unwieldy army and his numerous cavalry had not been able to follow his versatile enemy into the mountains; Caesar like Calvinus had escaped from pursuit, and the two stood united and in full security in Thessaly.
Perhaps it would have been the best course, if Pompeius had now without delay embarked with his main force for Italy, where success was scarcely doubtful. But in the meantime only a division of the fleet departed for Sicily and Italy. In the camp of the coalition the contest with Caesar was looked on as so completely decided by the battles of Dyrrhachium that it only remained to reap the fruits of victory, in other words, to seek out and capture the defeated army.
Their former over-cautious reserve was succeeded by an arrogance still less justified by the circumstances; they gave no heed to the facts, that they had, strictly speaking, failed in the pursuit, that they had to hold themselves in readiness to encounter a completely refreshed and reorganized army in Thessaly, and that there was no small risk in moving away from the sea, renouncing the support of the fleet, and following their antagonist to the battlefield chosen by himself. They were simply resolved at any price to fight with Caesar, and therefore to get at him as soon as possible and by the most convenient way. Cato took up the command in Dyrrhachium, where a garrison was left behind of eighteen cohorts, and in Corcyra, where 300 ships of war were left; Pompeius and Scipio proceeded - the former, apparently, following the Egnatian way as far as Pella and then striking into the great road to the south, the latter from the Haliacmon through the passes of Olympus - to the lower Peneius and met at Larisa.
Caesar lay to the south of Larisa in the plain - which extends between the hill-country of Cynoscephalae and the chain of Othrys and is intersected by a tributary of the Peneius, the Enipeus - on the left bank of the latter stream near the town of Pharsalus; Pompeius pitched his camp opposite to him on the right bank of the Enipeus along the slope of the heights of Cynoscephalae[30]. The entire army of Pompeius was assembled; Caesar on the other hand still expected the corps of nearly two legions formerly detached to Aetolia and Thessaly, now stationed under Quintus Fufius Calenus in Greece, and the two legions of Cornificius which were sent after him by the land-route from Italy and had already arrived in Illyria. The army of Pompeius, numbering eleven legions or 47,000 men and 7000 horse, was more than double that of Caesar in infantry, and seven times as numerous in cavalry; fatigue and conflicts had so decimated Caesar's troops, that his eight legions did not number more than 22,000 men under arms, consequently not nearly the half of their normal amount. The victorious army of Pompeius provided with a countless cavalry and good magazines had provisions in abundance, while the troops of Caesar had difficulty in keeping themselves alive and only hoped for better supplies from the corn-harvest not far distant. The Pompeian soldiers, who had learned in the last campaign to know war and trust their leader, were in the best of humour. All military reasons on the side of Pompeius favoured the view, that the decisive battle should not be long delayed, seeing that they now confronted Caesar in Thessaly; and the emigrant impatience of the many genteel officers and others accompanying the army doubtless had more weight than even such reasons in the council of war. Since the events of Dyrrhachium these lords regarded the triumph of their party as an ascertained fact; already there was eager strife as to the filling up of Caesar's supreme pontificate, and instructions were sent to Rome to hire houses at the Forum for the next elections. When Pompeius hesitated on his part to cross the rivulet which separated the two armies, and which Caesar with his much weaker army did not venture to pass, this excited great indignation; Pompeius, it was alleged, only delayed the battle in order to rule somewhat longer over so many consulars and praetorians and to perpetuate his part of Agamemnon. Pompeius yielded; and Caesar, who under the impression that matters would not come to a battle, had just projected a mode of turning the enemy's army and for that purpose was on the point of setting out towards Scotussa, likewise arrayed his legions for battle, when he saw the Pompeians preparing to offer it to him on his bank.
Thus the battle of Pharsalus was fought on the 9th August 706, almost on the same field where a hundred and fifty years before the Romans had laid the foundation of their dominion in the east[31]. Pompeius rested his right wing on the Enipeus; Caesar opposite to him rested his left on the broken ground stretching in front of the Enipeus; the two other wings were stationed out in the plain, covered in each case by the cavalry and the light troops.
The intention of Pompeius was to keep his infantry on the defensive, but with his cavalry to scatter the weak band of horsemen which, mixed after the German fashion with light infantry, confronted him, and then to take Caesar's right wing in rear. His infantry courageously sustained the first charge of that of the enemy, and the engagement there came to a stand. Labienus likewise dispersed the enemy's cavalry after a brave but short resistance, and deployed his force to the left with the view of turning the infantry. But Caesar, foreseeing the defeat of his cavalry, had stationed behind it on the threatened flank of his right wing some 2000 of his best legionaries. As the enemy's horsemen, driving those of Caesar before them, galloped along and around the line, they suddenly came upon this select corps advancing intrepidly against them and, rapidly thrown into confusion by the unexpected and unusual infantry attack[32], they galloped at full speed from the field of battle. The victorious legionaries cut to pieces the enemy's archers now unprotected, then rushed at the left wing of the enemy, and began now on their part to turn it. At the same time Caesar's third division hitherto reserved advanced along the whole line to the attack. The unexpected defeat of the best arm of the Pompeian army, as it raised the courage of their opponents, broke that of the army and above all that of the general. When Pompeius, who from the outset did not trust his infantry, saw the horsemen gallop off, he rode back at once from the field of battle to the camp, without even awaiting the issue of the general attack ordered by Caesar. His legions began to waver and soon to retire over the brook into the camp, which was not accomplished without severe loss.
The day was thus lost and many an able soldier had fallen, but the army was still substantially intact, and the situation of Pompeius was far less perilous than that of Caesar after the defeat of Dyrrhachium. But while Caesar in the vicissitudes of his destiny had learned that fortune loves to withdraw herself at certain moments even from her favourites in order to be once more won back through their perseverance, Pompeius knew fortune hitherto only as the constant goddess, and despaired of himself and of her when she withdrew from him; and, while in Caesar's grander nature despair only developed yet mightier energies, the inferior soul of Pompeius under similar pressure sank into the infinite abyss of despondency. As once in the war with Sertorius he had been on the point of abandoning the office entrusted to him in presence of his superior opponent and of departing[33], so now, when he saw the legions retire over the stream, he threw from him the fatal general's scarf, and rode off by the nearest route to the sea, to find means of embarking there. His army discouraged and leaderless - for Scipio, although recognized by Pompeius as colleague in supreme command, was yet general-in-chief only in name - hoped to find protection behind the camp-walls; but Caesar allowed it no rest; the obstinate resistance of the Roman and Thracian guard of the camp was speedily overcome, and the mass was compelled to withdraw in disorder to the heights of Crannon and Scotussa, at the foot of which the camp was pitched. It attempted by moving forward along these hills to regain Larisa; but the troops of Caesar, heeding neither booty nor fatigue and advancing by better paths in the plain, intercepted the route of the fugitives; in fact, when late in the evening the Pompeians suspended their march, their pursuers were able even to draw an entrenched line which precluded the fugitives from access to the only rivulet to be found in the neighbourhood. So ended the day of Pharsalus. The enemy's army was not only defeated, but annihilated; 15,000 of the enemy lay dead or wounded on the field of battle, while the Caesarians missed only 200 men; the body which remained together, amounting still to nearly 20,000 men, laid down their arms on the morning after the battle only isolated troops, including, it is true, the officers of most note, sought a refuge in the mountains; of the eleven eagles of the enemy nine were handed over to Caesar. Caesar, who on the very day of the battle had reminded the soldiers that they should not forget the fellow-citizen in the foe, did not treat the captives as did Bibulus and Labienus; nevertheless he too found it necessary now to exercise some severity. The common soldiers were incorporated in the army, fines or confiscations of property were inflicted on the men of better rank; the senators and equites of note who were taken, with few exceptions, suffered death. The time for clemency was past; the longer the civil war lasted, the more remorseless and implacable it became.
30. The exact determination of the field of battle is difficult. Appian (ii. 75) expressly places it between (New) Pharsalus (now Fersala) and the Enipeus. Of the two streams, which alone are of any importance in the question, and are undoubtedly the Apidanus and Enipeus of the ancients - the Sofadhitiko and the Fersaliti - the former has its sources in the mountains of Thaumaci (Dhomoko) and the Dolopian heights, the latter in mount Othrys, and the Fersaliti alone flows past Pharsalus; now as the Enipeus according to Strabo (ix. p. 432) springs from mount Othrys and flows past Pharsalus, the Fersaliti has been most justly pronounced by Leake (Northern Greece, iv. 320) to be the Enipeus, and the hypothesis followed by Goler that the Fersaliti is the Apidanus is untenable. With this all the other statements of the ancients as to the two rivers agree. Only we must doubtless assume with Leake, that the river of Vlokho formed by the union of the Fersaliti and the Sofadhitiko and going to the Peneius was called by the ancients Apidanus as well as the Sofadhitiko; which, however, is the more natural, as while the Sofadhitiko probably has, the Fersaliti has not, constantly water (Leake, iv. 321). Old Pharsalus, from which the battle takes its name, must therefore have been situated between Fersala and the Fersaliti. Accordingly the battle was fought on the left bank of the Fersaliti, and in such a way that the Pompeians, standing with their faces towards Pharsalus, leaned their right wing on the river (Caesar, B. C. iii. 83; Frontinus, Strat. ii. 3, 22). The camp of the Pompeians, however, cannot have stood here, but only on the slope of the heights of Cynoscephalae, on the right bank of the Enipeus, partly because they barred the route of Caesar to Scotussa, partly because their line of retreat evidently went over the mountains that were to be found above the camp towards Larisa; if they had, according to Leake's hypothesis (iv. 482), encamped to the east of Pharsalus on the left bank of the Enipeus, they could never have got to the northward through this stream, which at this very point has a deeply cut bed (Leake, iv. 469), and Pompeius must have fled to Lamia instead of Larisa. Probably therefore the Pompeians pitched their camp on the right bank of the Fersaliti, and passed the river both in order to fight and in order, after the battle, to regain their camp, whence they then moved up the slopes of Crannon and Scotussa, which culminate above the latter place in the heights of Cynoscephalae. This was not impossible. the Enipeus is a narrow slow-flowing rivulet, which Leake found two feet deep in November, and which in the hot season often lies quite dry (Leake, i. 448, and iv. 472; comp. Lucan, vi. 373), and the battle was fought in the height of summer. Further the armies before the battle lay three miles and a half from each other (Appian, B. C. ii. 65), so that the Pompeians could make all preparations and also properly secure the communication with their camp by bridges. Had the battle terminated in a complete rout, no doubt the retreat to and over the river could not have been executed, and doubtless for this reason Pompeius only reluctantly agreed to fight here. The left wing of the Pompeians which was the most remote from the base of retreat felt this; but the retreat at least of their centre and their right wing was not accomplished in such haste as to be impracticable under the given conditions. Caesar and his copyists are silent as to the crossing of the river, because this would place in too clear a light the eagerness for battle of the Pompeians apparent otherwise from the whole narrative, and they are also silent as to the conditions of retreat favourable for these.
31. III. VIII. Battle of Cynoscephalae.
32. With this is connected the well-known direction of Caesar to his soldiers to strike at the faces of the enemy's horsemen. the infantry - which here in an altogether irregular way acted on the offensive against cavalry, who were not to be reached with the sabres - were not to throw their
33. V. I. Indefinite and Perilous Character of the Sertorian War.