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
Political Projects of Marius
There is hardly any doubt that Marius entered into the brilliant prospects which his military and political position opened up to him. It was a sad and troubled time. Men had peace, but they were not glad of having it; the state of things was not now such as it had formerly been after the first mighty onset of the men of the north on Rome, when, so soon as the crisis was over, all energies were roused anew in the fresh consciousness of recovered health, and had by their vigorous development rapidly and amply made up for what was lost.
Every one felt that, though able generals might still once and again avert immediate destruction, the commonwealth was only the more surely on the way to ruin under the government of the restored oligarchy; but every one felt also that the time was past when in such cases the burgess-body came to its own help, and that there was no amendment so long as the place of Gaius Gracchus remained empty. How deeply the multitude felt the blank that was left after the disappearance of those two illustrious youths who had opened the gates to revolution, and how childishly in fact it grasped at any shadow of a substitute, was shown by the case of the pretended son of Tiberius Gracchus, who, although the very sister of the two Gracchi charged him with fraud in the open Forum, was yet chosen by the people in 655 as tribune solely on account of his usurped name.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/4-06-marius-revolution-drusus-reform.asp?pg=15