Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
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.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=87