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
The catastrophe of June 701, by which army and general in Syria perished, was therefore a terribly severe blow also for Caesar. A few months later the national insurrection blazed up more violently than ever in Gaul, just when it had seemed completely subdued, and for the first time Caesar here encountered an equal opponent in the Arvernian king Vercingetorix. Once more fate had been working for Pompeius; Crassus was dead, all Gaul was in revolt, Pompeius was practically dictator of Rome and master of the senate.
What might have happened, if he had now, instead of remotely intriguing against Caesar, summarily compelled the burgesses or the senate to recall Caesar at once from Gaul! But Pompeius never understood how to take advantage of fortune. He heralded the breach clearly enough; already in 702 his acts left no doubt about it, and in the spring of 703 he openly expressed his purpose of breaking with Caesar; but he did not break with him, and allowed the months to slip away unemployed.
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Reference address : https://www.ellopos.net/elpenor/rome/5-09-crassus-joint-rulers.asp?pg=23