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
Regulation of Their Functions by Sulla - Separation of the Political and Military Authority - Cisalpine Gaul Erected into a Province
Such was the state of things which Sulla found existing, and which formed the basis of his new arrangement. Its main principles were, a complete separation between the political authority which governed in the burgess-districts and the military authority which governed in the non-burgess-districts, and an uniform extension of the duration of the supreme magistracy from one year to two, the first of which was devoted to civil, and the second to military affairs. Locally the civil and the military authority had certainly been long separated by the constitution, and the former ended at the -pomerium-, where the latter began; but still the same man held the supreme political and the supreme military power united in his hand.
In future the consul and praetor were to deal with the senate and burgesses, the proconsul and propraetor were to command the army; but all military power was cut off by law from the former, and all political action from the latter. This primarily led to the political separation of the region of Northern Italy from Italy proper. Hitherto they had stood doubtless in a national antagonism, inasmuch as Northern Italy was inhabited chiefly by Ligurians and Celts, Central and Southern Italy by Italians; but, in a political and administrative point of view, the whole continental territory of the Roman state from the Straits to the Alps including the Illyrian possessions--burgess, Latin, and non-Italian communities without exception--was in the ordinary course of things under the administration of the supreme magistrates who were acting in Rome, as in fact her colonial foundations extended through all this territory.
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Reference address : http://www.ellopos.net/elpenor/rome/4-10-sullan-constitution.asp?pg=36