Naples, executed Baldassarre of Brunswick, Caetani's brother-in-law and his main link with the Neapolitan court, and hired Onorato's brother Giacomo to conquer Fondi. Velletri expelled his Breton mercenaries and also Anagni revolted against him. Caetani however was able to resist, and was one of the supporters of Louis I of Anjou in his attempt to capture the Kingdom of Naples. During the war between the former's successor, Louis II of Anjou and Ladislaus of Durazzo, Caetani did not change sides, and remained an ally of Clement VII and his Avignonese successor, Benedict XIII. This led pope Boniface IX to excommunicate him again (3 May 1399), and a crusade was launched against Fondi. King Ladislaus attacked his lands from the south while papal troops came from the north. After losing Anagni, Sezze and Cisterna, he tried a desperate assault to Rome (15 January 1400), but was defeated at Porta del Popolo. Onorato Caetani decided to submit to Boniface IX, but died soon afterwards of apoplexy. Sources 1360s births 1400 deaths Onorato 1 People from the Province of Latina People excommunicated by the Catholic Church