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 division of the body of burgesses was based on the "wardship," -curia- (probably related to -curare- = -coerare-, --koiranos--); ten wardships formed the community; every wardship furnished a hundred men to the infantry (hence -mil-es-, like -equ-es-, the thousand-walker), ten horsemen and ten councillors. When communities combined, each of course appeared as a part (-tribus-) of the whole community (-tota-in Umbrian and Oscan), and the original unit became multiplied by the number of such parts.
This division had reference primarily to the personal composition of the burgess-body, but it was applied also to the domain so far as the latter was apportioned at all. That the curies had their lands as well as the tribes, admits of the less doubt, since among the few names of the Roman curies that have been handed down to us we find along with some apparently derived from -gentes-, e. g. -Faucia-, others certainly of local origin, e. g. -Veliensis-; each one of them embraced, in this primitive period of joint possession of land, a number of clan-lands, of which we have already spoken.(5)
We find this constitution under its simplest form(6) in the scheme of the Latin or burgess communities that subsequently sprang up under the influence of Rome; these had uniformly the number of a hundred councillors (-centumviri-). But the same normal numbers make their appearance throughout in the earliest tradition regarding the tripartite Rome, which assigns to it thirty curies, three hundred horsemen, three hundred senators, three thousand foot-soldiers.
5. I. III. Clan-villages
6. Even in Rome, where the simple constitution of ten curies otherwise early disappeared, we still discover one practical application of it, and that singularly enough in the very same formality which we have other reasons for regarding as the oldest of all those that are mentioned in our legal traditions, the -confarreatio-. It seems scarcely doubtful that the ten witnesses in that ceremony had the same relation to the constitution of ten curies the thirty lictors had to the constitution of thirty curies.
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Reference address : https://www.ellopos.net/elpenor/rome/1-05-original-constitution-rome.asp?pg=14