 The other, M. Cornelius Cethegus, had to stay in Etruria and sever the conspiracy that Mago had formed with a number of rebellious Etrurian towns.In 203 BC, the time came for decisive action.The proconsul M. Cornelius Cethegus and the praetor P. Quintilius Varus led an army of four legions against Mago in a regular battle in the Insubrian land (not far from modern Milan).