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
Lucius Domitius, the hero of Corfinium, gravely proposed in the council of war that those senators who had fought in the army of Pompeius should come to a vote on all who had either remained neutral or had emigrated but not entered the army, and should according to their own pleasure individually acquit them or punish them by fine or even by the forfeiture of life and property. Another of these ultras formally lodged with Pompeius a charge of corruption and treason against Lucius Afranius for his defective defence of Spain.
Among these deep-dyed republicans their political theory assumed almost the character of a confession of religious faith; they accordingly hated their own more lukewarm partisans and Pompeius with his personal adherents, if possible, still more than their open opponents, and that with all the dull obstinacy of hatred which is wont to characterize orthodox theologians; and they were mainly to blame for the numberless and bitter separate quarrels which distracted the emigrant army and emigrant senate. But they did not confine themselves to words. Marcus Bibulus, Titus Labienus, and others of this coterie carried out their theory in practice, and caused such officers or soldiers of Caesar's army as fell into their hands to be executed en masse; which, as may well be conceived, did not tend to make Caesar's troops fight with less energy.
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Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=58