At the time of the outbreak of the Social War in 91 B.C. there were many types of political organisation in Cisalpine Gaul. First, there were the Roman colonies of Mutina, Parma, and Eporedia. Secondly, there were the large areas of land south of the Po in Liguria and centred on the chief highway in Aemilia which were already occupied by Roman citizens in the Pollia tribe, but where urbanisation was a more or less spontaneous development and where there was certainly not the elaborate political organisation of the colonies. Thirdly, there were the Latin colonies of Ariminum, Placentia, Cremona, Bononia, and Aquileia. We may say that all this territory was occupied by settlers of Roman or Latin origin, with the reservation that in Liguria, where the colonised land was probably not so extensive or so continuous as in Aemilia, there may still have been a considerable number of the former inhabitants living in association with the Romans. Archaeological investigation has not yet told us whether there were two separate inhabited sites in each case, but the doubling of place-names (Industria—Bodincomagus, Potentia—Carreum, Sedulia?—Vardagate) may indicate that the Ligures were allowed some kind of separate political organisation and local centres near to, but distinct from, the centres created by the Romans to serve the needs of their ager. If there were two separate inhabited sites and organisations, however, these did not remain independent of each other for long. Certainly after 89 B.C. Romans and native peoples formed single communities.