These actions caused political and social unrest, but when Octavian asked for a divorce from Claudia, Fulvia herself decided to take action. Together with Lucius Antonius, her brother-in-law, she raised eight legions in Italy to fight for Antonius' rights against Octavian, in what became the Perusine War. The army occupied Rome for a short time, but eventually retreated to Perusia (modern Perugia). Octavian besieged Fulvia and Lucius Antonius in the winter of 41-40 BC, starving them into surrender. Fulvia was exiled to Sicyon, where she died of a sudden illness.