In April 1877, Malatesta, Carlo Cafiero, Sergey Stepnyak-Kravchinsky and about thirty others started an insurrection in the province of Benevento, taking the villages of Letino and Gallo without a struggle. The revolutionaries burned tax registers and declared the end of the King's reign and were met by enthusiasm. After leaving Gallo, however, they were arrested by government troops and held for sixteen months before being acquitted. After Giovanni Passannante's murder attempt on the king Umberto I, the radicals were kept under constant surveillance by the police. Even though the anarchists claimed to have no connection to Passannante, Malatesta, being an advocate of social revolution, was included in this surveillance. After returning to Naples, he was forced to leave Italy altogether in the fall of 1878 because of these conditions, beginning his life in exile.