See Kersaint's own works, Le Bon Sens (1789); the Rubicon (1789); Considerations sur la force publique et l'institution des gardes nationales (1789); Lettre a Mirabeau (1791); Moyens presentes a l'Assemblee nationale pour retablir la paix et l'ordre dans les colonies; also E.
It was separated from Etruria and Umbria by the main chain of the Apennines; and the river Ariminus was substituted for the far-famed Rubicon as its limit on the Adriatic.
It was separate from Italy proper, the Aesis first and then the Rubicon being the boundary on the east, and the Arnus the boundary on the west, so that, for example, Luca remained outside the boundaries of Italy proper, even in 89 B.C. Romanization had, however, progressed considerably, the foundation of colonies and the construction of roads had gone on during the 2nd century, and the whole district as far as the Padus was given the Roman franchise in 89 B.C., while the Transpadanes received Latin rights, and were fully enfranchised forty years later.
It was adopted by Augustus as the boundary of Gallia Cispadana; the far-famed Rubicon was a trifling stream a few miles farther north, now called Fiumicino.
In 90 B.C. it acquired Roman citizenship, but in 82 B.C. having been held by the partisans of Marius, it was plundered by those of Sulla (who probably made the Rubicon the frontier of Italy instead of the Aesis), and a military colony settled there.
As such it was assigned to Julius Caesar, together with Transalpine Gaul, and it was not till he crossed the Rubicon that he entered Italy in the strict sense of the term.