Civil war flared again when the Second Triumvirate of Octavian, Lepidus and Mark Antony failed just as the first had almost as soon as its opponents had been removed. The ambitious Octavian built a power base and then launched a campaign against Mark Antony. Together with Lucius Antonius, Mark Antony's wife Fulvia raised an army in Italy to fight for Antony's rights against Octavian but she was defeated by Octavian at the Battle of Perugia. Her death led to partial reconciliation between Octavian and Antony who went on to crush the army of Sextus Pompeius, the last focus of opposition to the second triumvirate, in the naval Battle of Naulochus.