saly, 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 trans