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
Perhaps the worst consequence of the continual courting of the favour of the multitude by the ruling aristocracy was the incompatibility of such a begging and fawning part with the position which the government should rightfully occupy in relation to the governed.
The government was thus converted from a blessing into a curse for the people. They no longer ventured to dispose of the property and blood of the burgesses, as exigency required, for the good of their country. They allowed the burgesses to become habituated to the dangerous idea that they were legally exempt from the payment of direct taxes even by way of advance--after the war with Perseus no further advance had been asked from the community.
They allowed their military system to decay rather than compel the burgesses to enter the odious transmarine service; how it fared with the individual magistrates who attempted to carry out the conscription according to the strict letter of the law, has already been related.(4)
4. Cf. IV. I. General Results
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Reference address : https://www.ellopos.net/elpenor/rome/4-02-reform-tiberius-gracchus.asp?pg=11