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
The abolition of the mock sovereignty of the leagues and of all the vague and pernicious dreams connected with them was a blessing for the country; and the government of the Roman commander-in-chief of Macedonia, however much it fell short of what was to be wished, was yet far better than the previous confusion and misrule of Greek confederacies and Roman commissions. The Peloponnesus ceased to be the great harbour of mercenaries; it is affirmed, and may readily be believed, that with the direct government of Rome security and prosperity in some measure returned.
The epigram of Themistocles, that ruin had averted ruin, was applied by the Greeks of that day not altogether without reason to the loss of Greek independence. The singular indulgence, which Rome even now showed towards the Greeks, becomes fully apparent only when compared with the contemporary conduct of the same authorities towards the Spaniards and Phoenicians. To treat barbarians with cruelty seemed not unallowable, but the Romans of this period, like the emperor Trajan in later times, deemed it "harsh and barbarous to deprive Athens and Sparta of the shadow of freedom which they still retained." All the more marked is the contrast between this general moderation and the revolting treatment of Corinth--a treatment disapproved by the orators who defended the destruction of Numantia and Carthage, and far from justified, even according to Roman international law, by the abusive language uttered against the Roman deputies in the streets of Corinth.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=86