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
It was rumoured (Oct. 704) that Caesar had moved four legions from Transalpine into Cisalpine Gaul and stationed them at Placentia. This transference of troops was of itself within the prerogative of the governor; Curio moreover palpably showed in the senate the utter groundlessness of the rumour; and they by a majority rejected the proposal of the consul Gaius Marcellus to give Pompeius on the strength of it orders to march against Caesar.
Yet the said consul, in concert with the two consuls elected for 705 who likewise belonged to the Catonian party, proceeded to Pompeius, and these three men by virtue of their own plenitude of power requested the general to put himself at the head of the two legions stationed at Capua, and to call the Italian militia to arms at his discretion. A more informal authorization for the commencement of a civil war can hardly be conceived; but people had no longer time to attend to such secondary matters; Pompeius accepted it. The military preparations, the levies began; in order personally to forward them, Pompeius left the capital in December 704.
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Reference address : https://www.ellopos.net/elpenor/rome/5-09-crassus-joint-rulers.asp?pg=47