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
When spring came on (681), the besieged redoubled their exertions and took the trenches constructed on Dindymon: nothing remained for the king but to raise the siege and with the aid of his fleet to save what he could. He went in person with the fleet to the Hellespont, but suffered considerable loss partly at its departure, partly through storms on the voyage. The land army under Hermaeus and Marius likewise set out thither, with the view of embarking at Lampsacus under the protection of its walls.
They left behind their baggage as well as the sick and wounded, who were all put to death by the exasperated Cyzicenes. Lucullus inflicted on them very considerable loss by the way at the passage of the rivers Aesepus and Granicus; but they attained their object. The Pontic ships carried off the remains of the great army and the citizens of Lampsacus themselves beyond the reach of the Romans.
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Reference address : https://www.ellopos.net/elpenor/rome/5-02-rule-sullan-restoration.asp?pg=32