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
Pompeius' Plan of Campaign for 705
How far these events of the war in 705 interfered with Pompeius' general plan for the campaign, and particularly what part, in that plan was assigned after the loss of Italy to the important military corps in the west, can only be determined by conjecture. That Pompeius had the intention of coming by way of Africa and Mauretania to the aid of his army fighting in Spain, was simply a romantic, and beyond doubt altogether groundless, rumour circulating in the camp of Ilerda. It is much more likely that he still kept by his earlier plan of attacking Caesar from both sides in Transalpine and Cisalpine Gaul(21) even after the loss of Italy, and meditated a combined attack at once from Spain and Macedonia.
21. Cf. V. X. Caesar Takes the Offensive
It may be presumed that the Spanish army was meant to remain on the defensive at the Pyrenees till the Macedonian army in the course of organization was likewise ready to march; whereupon both would then have started simultaneously and effected a junction according to circumstances either on the Rhone or on the Po, while the fleet, it may be conjectured, would have attempted at the same time to reconquer Italy proper. On this supposition apparently Caesar had first prepared himself to meet an attack on Italy. One of the ablest of his officers, the tribune of the people Marcus Antonius, commanded there with propraetorian powers.
The southeastern ports--Sipus, Brundisium, Tarentum--where an attempt at landing was first to be expected, had received a garrison of three legions. Besides this Quintus Hortensius, the degenerate son of the well-known orator, collected a fleet in the Tyrrhene Sea, and Publius Dolabella a second fleet in the Adriatic, which were to be employed partly to support the defence, partly to transport the intended expedition to Greece. In the event of Pompeius attempting to penetrate by land into Italy, Marcus Licinius Crassus, the eldest son of the old colleague of Caesar, was to conduct the defence of Cisalpine Gaul, Gaius the younger brother of Marcus Antonius that of Illyricum.
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=53