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In page Messina:

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One of the major cities on Sicily, Messina was heavily involved in the rivalry between the Anjou dynasty in Naples and the Aragonese House of Barcelona. Initially a stronghold of Anjou support on Sicily, in 1282 the city joined the revolt of the Sicilian Vespers, resulting in the city being subjected to a major siege by Charles I of Anjou. Messina remained a major naval base for the remainder of the ensuing twenty-year War of the Sicilian Vespers, and was besieged a second time in 1302. In 1345 Orlando d'Aragona, the illegitimate son of Frederick II of Sicily was the strategos of Messina.[citation needed]