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
Indefinite and Perilous Character of the Sertorian War
For five years the Sertorian war thus continued, and still there seemed no prospect of its termination. The state suffered from it beyond description. The flower of the Italian youth perished amid the exhausting fatigues of these campaigns. The public treasury was not only deprived of the Spanish revenues, but had annually to send to Spain for the pay and maintenance of the Spanish armies very considerable sums, which the government hardly knew how to raise. Spain was devastated and impoverished, and the Roman civilization, which unfolded so fair a promise there, received a severe shock; as was naturally to be expected in the case ofan insurrectionary war waged with so much bitterness, and but too often occasioning the destruction of whole communities.
Even the towns which adhered to the dominant party in Rome had countless hardships to endure; those situated on the coast had to be provided with necessaries by the Roman fleet, and the situation of the faithful communities in the interior was almost desperate. Gaul suffered hardly less, partly from the requisitions for contingents of infantry and cavalry, for grain and money, partly from the oppressive burden of the winter-quarters, which rose to an intolerable degree in consequence of the bad harvest of 680; almost all the local treasuries were compelled to betake themselves to the Roman bankers, and to burden themselves with a crushing load of debt. Generals and soldiers carried on the war with reluctance.
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Reference address : https://www.ellopos.net/elpenor/rome/5-01-lepidus-sertorius.asp?pg=48