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 has often been observed that the soldier, even where he has determined to refuse obedience to those set over him, involuntarily when that obedience is demanded resumes his place in the ranks. It was this feeling that made Lafayette and Dumouriez hesitate at the last moment before the breach of faith and break down; and to this too Pompeius succumbed.
In the autumn of 692 Pompeius embarked for Italy. While in the capital all was being prepared for receiving the new monarch, news came that Pompeius, when barely landed at Brundisium, had broken up his legions and with a small escort had entered on his journey to the capital. If it is a piece of good fortune to gain a crown without trouble, fortune never did more for mortal than it did for Pompeius; but on those who lack courage the gods lavish every favour and every gift in vain.
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Reference address : https://www.ellopos.net/elpenor/rome/5-06-pompeius-coalition-pretenders.asp?pg=11