After twenty years of war involving virtually every state in western Europe, either in combat or diplomatically, what would be called the War of the Sicilian Vespers finally came to an end after the loss of thousands of lives and the destruction of large portions of Sicily and southern Italy. The treaty was initially viewed as a victory for the Angevins who supposedly would receive the island after Frederick's III death. However, diplomatic maneuvering by both the Sicilians and the Aragonese eventually would result in the Crown of Aragon gaining control of not only Mallorca in 1343, but the Kingdom of Sicily by the end of the fifteenth century.
Despite the pullout of the Crown of Aragon from Sicily in 1295, the Catalans had maintained a strong presence on the island and flourished under Frederick III. These Catalan merchants would continue to influence both the economic and political policies of the government. Aragon and Sicily would maintain close political and economic ties throughout the fourteenth century, so that while Aragon did not have direct control of Sicily, it continued to enjoy the economic and even strategic benefits of the island. By the late fourteenth century Sicily had been returned to what was now called the Kingdom of Naples. However, the Kingdom was no longer under Angevin control. Moreover, when a series of revolts broke out in Sicily between 1392 and 1400 it was King Martin El Humano of Aragon who intervened to restore order. Similarly, when civil war broke out among the nobility in 1411 it was an embassy from the parliament of Catalonia that finally adjudicated the dispute. The Aragonese influence in both Sicily and the court of the Kingdom of Naples became so strong that in 1415 the title of lieutenant-general of the island of Sicily was granted to the future king of Aragon, John II, and in 1460 both Sicily and Sardinia were permanently incorporated into the Crown of Aragon. While the various rulers of Aragon and Catalonia may not have had a rigid policy of expansion, the constant political pressure and maneuvering finally gained the Crown of Aragon what it had tried to gain by force for twenty long years.
