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
Prevention of Special Leagues
If hitherto considerable freedom of movement had been allowed within the confederacy, and for example the six old Latin communities, Aricia, Tusculum, Tibur, Lanuvium, Cora, and Laurentum, and the two new Latin, Ardea and Suessa Pometia, had been permitted to found in common a shrine for the Aricine Diana; it is doubtless not the mere result of accident that we find no further instance in later times of similar separate confederations fraught with danger to the hegemony of Rome.
Revision of the Municipal Constitutions. Police Judges
We may likewise assign to this epoch the further remodelling which the Latin municipal constitutions underwent, and their complete assimilation to the constitution of Rome. If in after times two aediles, intrusted with the police-supervision of markets and highways and the administration of justice in connection therewith, make their appearance side by side with the two praetors as necessary elements of the Latin magistracy, the institution of these urban police functionaries, which evidently took place at the same time and at the instigation of the leading power in all the federal communities, certainly cannot have preceded the establishment of the curule aedileship in Rome, which occurred in 387; probably it took place about that very time. Beyond doubt this arrangement was only one of a series of measures curtailing the liberties and modifying the organization of the federal communities in the interest of aristocratic policy.
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Reference address : https://www.ellopos.net/elpenor/rome/2-05-subjugation-latins-campanians.asp?pg=20