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
Accordingly Caesar advanced into Italy.(15)
15. The decree of the senate was passed on the 7th January; on the 18th it had been already for several days known in Rome that Caesar had crossed the boundary (Cic. ad Att. vii. 10; ix. 10, 4); the messenger needed at the very least three days from Rome to Ravenna. According to this the setting out of Caesar falls about the 12th January, which according to the current reduction corresponds to the Julian 24 Nov. 704.
Two highways led at that time from the Romagna to the south; the Aemilio-Cassian which led from Bononia over the Apennines to Arretium and Rome, and the Popillio-Flaminian, which led from Ravenna along the coast of the Adriatic to Fanum and was there divided, one branch running westward through the Furlo pass to Rome, another southward to Ancona and thence onward to Apulia. On the former Marcus Antonius advanced as far as Arretium, on the second Caesar himself pushed forward.
Resistance was nowhere encountered; the recruiting officers of quality had no military skill, their bands of recruits were no soldiers, the inhabitants of the country towns were only anxious not to be involved in a siege. When Curio with 1500 men approached Iguvium, where a couple of thousand Umbrian recruits had assembled under the praetor Quintus Minucius Thermus, general and soldiers took to flight at the bare tidings of his approach; and similar results on a small scale everywhere ensued.
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Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=19