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
But the culpable negligence of the Africans intoxicated with victory wrested from them its consequences; they allowed themselves to be surprised in a deep sleep during the morning twilight by the Roman troops which had been in some measure reorganized during the night, and were fortunately dispersed.
Thereupon the Roman army continued its retreat in better order and with greater caution; but it was yet again assailed simultaneously on ail the four sides and was in great danger, till the cavalry officer Lucius Cornelius Sulla first dispersed the squadrons opposed to him and then, rapidly returning from their pursuit, threw himself also on Jugurtha and Bocchus at the point where they in person pressed hard on the rear of the Roman infantry. Thus this attack also was successfully repelled; Marius brought his army back to Cirta, and took up his winter quarters there (648-9).
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Reference address : https://www.ellopos.net/elpenor/rome/4-04-rule-restoration.asp?pg=55