being the bastard of Martin's predeceased son, Martin I of Sicily. Born illegitimate, he had been legitimized by Antipope Benedict XIII. Family tree Interregnum 1410–12 The parties had agreed to a parliamentary process to resolve the issue, but coordinating deliberations between the cortes (parliaments) of Aragon, Valencia and Catalonia was made difficult by their diverging interests. Thus, a general cortes was demanded by the governor of Catalonia to meet in Montblanch, but the meeting was delayed and ended up in Barcelona, starting in October 1410 and only being Cortes of the Principality of Catalonia. As the Cortes dragged on, the situation became violent. Antón de Luna, an Aragonese supporter of Count James II of Urgell, assassinated the Archbishop of Zaragoza, García Fernández de Heredía (supporter of Louis of Anjou). This event damaged the candidacy of James of Urgell and gave strength to the candidacy of Ferdinand of Castile (regent of Castile and therefore commanding a nearby army with which he protected his allies). There was fighting in the streets, especially between partisans of Aragon and Valencia. The conflict divided the Kingdom of Aragon, with two rival Cortes meeting: one favorable to Ferdinand of Castile in Alcañiz, and another favorable to James II, Count of Urgell in Mequinenza (but this one was not recognized by the Catalan parliament at Tortosa). The same occurred in Valencia, with Cortes in Traiguera and Vinaròs. Furthermore, in 1410-1412 Ferdinand's troops entered Aragon and Valencia to fight the Urgellists. The Trastamarist victory at the Battle of Morvedre on 27 February 1412 finally left Valencia in their hands. Conflicts and deliberations Pope Benedict XIII (Avignon) intervened and proposed a smaller group of nine compromisarios (negotiators). The Trastamarist parliament of Alcañiz agreed with the proposition, which was finally accepted by a Catalan-Aragonese board of fourteen Aragonese Trastamarists and five varied Catalan emissaries: the agreement known as the Alcañiz Concord of 15 February 1412. But a few days later, the Alcañiz parliament chose not only the three compromisarios from Aragon but also the three Catalan and the three Valencian compromisarios too. The angry complaints among the Catalan and Valencian parliamentarians for this abuse were ignored, targeting the peaceful discussions sought since 1410; and equally the complaints of James of Urgell and Louis of Anjou. The appointed compromisarios met in Caspe to choose the next king. The majority of historians have agreed with the account of the election by historian