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
Had the heavy Asiatic cavalry been at hand, the battle might have been restored; but the left wing was shattered, and the right, led by Antiochus in person, had driven before it the little division of Roman cavalry opposed to it, and had reached the Roman camp, which was with great difficulty defended from its attack. In this way the cavalry were at the decisive moment absent from the scene of action. The Romans were careful not to assail the phalanx with their legions, but sent against it the archers and slingers, not one of whose missiles failed to take effect on the densely-crowded mass.
The phalanx nevertheless retired slowly and in good order, till the elephants stationed in the interstices became frightened and broke the ranks. Then the whole army dispersed in tumultuous flight; an attempt to hold the camp failed, and only increased the number of the dead and the prisoners. The estimate of the loss of Antiochus at 50,000 men is, considering the infinite confusion, not incredible; the legions of the Romans had never been engaged, and the victory, which gave them a third continent, cost them 24 horsemen and 300 foot soldiers. Asia Minor submitted; including even Ephesus, whence the admiral had hastily to withdraw his fleet, and Sardes the residence of the court.
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Reference address : https://www.ellopos.net/elpenor/rome/3-09-war-antiochus-asia.asp?pg=35