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
In front of Intercatia, Scipio Aemilianus, an esteemed military tribune, the son of the victor of Pydna and the adopted grandson of the victor of Zama, succeeded, by pledging his word of honour when that of the general no longer availed, in inducing the inhabitants to conclude an agreement by virtue of which the Roman army departed on receiving a supply of cattle and clothing. But the siege of Pallantia had to be raised for want of provisions, and the Roman army in its retreat was pursued by the Vaccaei as far as the Douro. Lucullus thereupon proceeded to the southern province, where in the same year the praetor, Servius Sulpicius Galba, had allowed himself to be defeated by the Lusitanians.
They spent the winter not far from each other-- Lucullus in the territory of the Turdetani, Galba at Conistorgis-- And in the following year (604) jointly attacked the Lusitanians. Lucullus gained some advantages over them near the straits of Gades. Galba performed a greater achievement, for he concluded a treaty with three Lusitanian tribes on the right bank of the Tagus and promised to transfer them to better settlements; whereupon the barbarians, who to the number of 7000 came to him for the sake of the expected lands, were separated into three divisions, disarmed, and partly carried off into slavery, partly massacred.
War has hardly ever been waged with so much perfidy, cruelty, and avarice as by these two generals; who yet by means of their criminally acquired treasures escaped the one from condemnation, and the other even from impeachment. The veteran Cato in his eighty-fifth year, a few months before his death, attempted to bring Galba to account before the burgesses; but the weeping children of the general, and the gold which he had brought home with him, proved to the Roman people his innocence.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=11