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
This new organization of the army was accompanied by a more careful
supervision of landed property on the part of the state. It was
now either ordained for the first time or, if not, at any rate
defined more carefully, that a land-register should be established,
in which the several proprietors of land should have their fields
with all their appurtenances, servitudes, slaves, beasts of draught
and of burden, duly recorded.
Every act of alienation, which did
not take place publicly and before witnesses, was declared null;
and a revision of the register of landed property, which was at
the same time the levy-roll, was directed to be made every fourth
year. The -mancipatio- and the -census- thus arose out of the
Servian military organization.
