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
That he might be enabled to complete this conquest undisturbed and might not be obliged to take in hand just at once the extrication of Italian affairs, he unhesitatingly gave up his superiority over his rivals and granted to Pompeius sufficient power to settle matters with the senate and its adherents. This was a grave political blunder, if Caesar had no other object than to become as quickly as possible king of Rome; but the ambition of that rare man was not confined to the vulgar aim of a crown.
He had the boldness to prosecute side by side, and to complete, two labours equally vast--the arranging of the internal affairs of Italy, and the acquisition and securing of a new and fresh soil for Italian civilization. These tasks of course interfered with each other; his Gallic conquests hindered much more than helped him on his way to the throne. It was fraught to him with bitter fruit that, instead of settling the Italian revolution in 698, he postponed it to 706. But as a statesman as well as a general Caesar was a peculiarly daring player, who, confiding in himself and despising his opponents, gave them always great and sometimes extravagant odds.
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Reference address : https://www.ellopos.net/elpenor/rome/5-08-pompeius-caesar.asp?pg=28