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
Marius reluctantly tolerated the assumption by his predecessor of the name of conqueror of Numidia; he flew into a violent rage when king Bocchus afterwards consecrated a golden effigy at the Capitol, which represented the surrender of Jugurtha to Sulla; and yet in the eyes of unprejudiced judges the services of these two threw the generalship of Marius very much into the shade--more especially Sulla's brilliant expedition to the desert, which had made his courage, his presence of mind, his acuteness, his power over men to be recognized by the general himself and by the whole army.
In themselves these military rivalries would have been of little moment, if they had not been mixed up with the conflict of political parties, if the opposition had not supplanted the senatorial general by Marius, and if the party of the government had not, with the deliberate intention of exasperating, praised Metellus and still more Sulla as the military celebrities and preferred them to the nominal victor. We shall have to return to the fatal consequences of these animosities when narrating the internal history.
Otherwise, this insurrection of the Numidian client-state passed away without producing any noticeable change either in political relations generally or even in those of the African province. By a deviation from the policy elsewhere followed at this period Numidia was not converted into a Roman province; evidently because the country could not be held without an army to protect the frontier against the barbarians of the desert, and the Romans were by no means disposed to maintain a standing army in Africa.
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Reference address : https://www.ellopos.net/elpenor/rome/4-04-rule-restoration.asp?pg=59