Consequences of Caesar's Defeats
But, even as it was, these days were fraught with mischief. Not only had Caesar endured the most serious losses and forfeited at a blow his entrenchments, the result of four months of gigantic labour; he was by the recent engagements thrown back again exactly to the point from which he had set out. From the sea he was more completely driven than ever, since Pompeius' elder son Gnaeus had by a bold attack partly burnt, partly carried off, Caesar's few ships of war lying in the port of Oricum, and had soon afterwards also set fire to the transport fleet that was left behind in Lissus; all possibility of bringing up fresh reinforcements to Caesar by sea from Brundisium was thus lost. The numerous Pompeian cavalry, now released from their confinement, poured themselves over the adjacent country and threatened to render the provisioning of Caesar's army, which had always been difficult, utterly impossible. Caesar's daring enterprise of carrying on offensive operations without ships against an enemy in command of the sea and resting on his fleet had totally failed. On what had hitherto been the theatre of war he found himself in presence of an impregnable defensive position, and unable to strike a serious blow either against Dyrrhachium or against the hostile army; on the other hand it depended now solely on Pompeius whether he should proceed to attack under the most favourable circumstances an antagonist already in grave danger as to his means of subsistence. The war had arrived at a crisis. Hitherto Pompeius had, to all appearance, played the game of war without special plan, and only adjusted his defence according to the exigencies of each attack; and this was not to be censured, for the protraction of the war gave him opportunity of making his recruits capable of fighting, of bringing up his reserves, and of bringing more fully into play the superiority of his fleet in the Adriatic. Caesar was beaten not merely in tactics but also in strategy. This defeat had not, it is true, that effect which Pompeius not without reason expected; the eminent soldierly energy of Caesar's veterans did not allow matters to come to an immediate and total breaking up of the army by hunger and mutiny. But yet it seemed as if it depended solely on his opponent by judiciously following up his victory to reap its full fruits.
War Prospects of Pompeius
Scipio and Calvinus
It was for Pompeius to assume the aggressive; and he was resolved to do so. Three different ways of rendering his victory fruitful presented themselves to him. The first and simplest was not to desist from assailing the vanquished army, and, if it departed, to pursue it. Secondly, Pompeius might leave Caesar himself and his best troops in Greece, and might cross in person, as he had long been making preparations for doing, with the main army to Italy, where the feeling was decidedly antimonarchical and the forces of Caesar, after the despatch of the best troops and their brave and trustworthy commandant to the Greek army, would not be of very much moment. Lastly, the victor might turn inland, effect a junction with the legions of Metellus Scipio, and attempt to capture the troops of Caesar stationed in the interior. The latter forsooth had, immediately after the arrival of the second freight from Italy, on the one hand despatched strong detachments to Aetolia and Thessaly to procure means of subsistence for his army, and on the other had ordered a corps of two legions under Gnaeus Domitius Calvinus to advance on the Egnatian highway towards Macedonia, with the view of intercepting and if possible defeating in detail the corps of Scipio advancing on the same road from Thessalonica. Calvinus and Scipio had already approached within a few miles of each other, when Scipio suddenly turned southward and, rapidly crossing the Haliacmon (Inje Karasu) and leaving his baggage there under Marcus Favonius, penetrated into Thessaly, in order to attack with superior force Caesar's legion of recruits employed in the reduction of the country under Lucius Cassius Longinus. But Longinus retired over the mountains towards Ambracia to join the detachment under Gnaeus Calvisius Sabinus sent by Caesar to Aetolia, and Scipio could only cause him to be pursued by his Thracian cavalry, for Calvinus threatened his reserve left behind under Favonius on the Haliacmon with the same fate which he had himself destined for Longinus. So Calvinus and Scipio met again on the Haliacmon, and encamped there for a considerable time opposite to each other.
Caesar's Retreat from Dyrrachium to Thessaly
Pompeius might choose among these plans; no choice was left to Caesar. After that unfortunate engagement he entered on his retreat to Apollonia. Pompeius followed. The march from Dyrrhachium to Apollonia along a difficult road crossed by several rivers was no easy task for a defeated army pursued by the enemy; but the dexterous leadership of their general and the indestructible marching energy of the soldiers compelled Pompeius after four days' pursuit to suspend it as useless. He had now to decide between the Italian expedition and the march into the interior. However advisable and attractive the former might seem, and though various voices were raised in its favour, he preferred not to abandon the corps of Scipio, the more especially as he hoped by this march to get the corps of Calvinus into his hands. Calvinus lay at the moment on the Egnatian road at Heraclea Lyncestis, between Pompeius and Scipio, and, after Caesar had retreated to Apollonia, farther distant from the latter than from the great army of Pompeius; without knowledge, moreover, of the events at Dyrrhachium and of his hazardous position, since after the successes achieved at Dyrrhachium the whole country inclined to Pompeius and the messengers of Caesar were everywhere seized. It was not till the enemy's main force had approached within a few hours of him that Calvinus learned from the accounts of the enemy's advanced posts themselves the state of things. A quick departure in a southerly direction towards Thessaly withdrew him at the last moment from imminent destruction; Pompeius had to content himself with having liberated Scipio from his position of peril. Caesar had meanwhile arrived unmolested at Apollonia. Immediately after the disaster of Dyrrhachium he had resolved if possible to transfer the struggle from the coast away into the interior, with the view of getting beyond the reach of the enemy's fleet—the ultimate cause of the failure of his previous exertions. The march to Apollonia had only been intended to place his wounded in safety and to pay his soldiers there, where his depots were stationed; as soon as this was done, he set out for Thessaly, leaving behind garrisons in Apollonia, Oricum, and Lissus. The corps of Calvinus had also put itself in motion towards Thessaly; and Caesar could effect a junction with the reinforcements coming up from Italy, this time by the land-route through Illyria—two legions under Quintus Cornificius—still more easily in Thessaly than in Epirus. Ascending by difficult paths in the valley of the Aous and crossing the mountain-chain which separates Epirus from Thessaly, he arrived at the Peneius; Calvinus was likewise directed thither, and the junction of the two armies was thus accomplished by the shortest route and that which was least exposed to the enemy. 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.
The Armies at Pharsalus
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.
The Battle