Leonardo Alagon

This succession, due to the rebellious behavior of the father of Leonardo, Artaldo, was opposed military by the viceroy of Sardinia, Nicolò Carroz d'Arborea, lord of Mandas and Terranova Pausania, who aspired to the possession of that vast territory, asserting that the will had no value, because the king had already decided that after the death of Cubello, the Marquisate of Oristano and the County of Goceano would be incorporated into the Crown of Aragon.

In 1474, with the peace treaty of Urgell, King John II of Aragon (called the Great), recognized Leonardo Alagon the right of succession, but the provocative conduct of Carroz did break out again the war.

The viceroy did not dare to face his rival in the open field, he went to Barcelona and persuaded the king to proceed against the Marquis on charges of treason and felony and the subsequent confiscation of fiefs and the death penalty.

Leonardo, before the defeat, left the battlefield and with his brothers, the sons and the Viscount of Sanluri fled to Bosa from where they boarded a ship with the intent to reach Corsica.

According to the writer Peter Carboni, their death was caused by grief and deep moral pain for the sad events experienced: they were buried in an underground cemetery of the Xativa castle.