spers diplomatically. This had broken out in 1282 between the Angevins and Aragonese over the possession of Sicily. The Pope offered this newly created crown to James II, the King of Aragon, promising him support should he wish to conquer Pisan Sardinia in exchange for Sicily.
In 1323 the king of Arborea formed an alliance with James II of Aragon against the Pisans, despite being aware of the Aragonese plans to take control of Sardinia, because they saw the Pisans as a bigger threat. It is also important to remember that the kings of Arborea descended in part from an Aragonese family. The Aragonese flag appeared on the Arborean coat of arms and flags along with the uprooted tree until the later conflict between Arborea and Aragon escalated. Following a military campaign which lasted a year or so, the Aragonese occupied the Pisan territories of Cagliari and Gallura along with the city of Sassari, naming them "The Kingdom of Sardinia and Corsica". However, soon the king of Arborea started to wage war against the Aragonese, having his own plans to unite Sardinia as one independent kingdom.
When the other Giudicati had been taken over by foreign powers, the kings of Arborea started to see themselves as the legitimate defenders of Sardinian rule and Sardinian interests. They not only waged war against the Kings of Aragon, who were trying to conquer all of Sardinia, they also formalised the legal and political institutions that were the basis of their statehood and independence, such as by promulgating the legal code of the kingdom in the Carta de Logu (English: Charter of the Land). The Carta de Logu was originally compiled by Mariano IV of Arborea, and was amended and updated by Mariano's daughter, Queen Eleanor of Arborea. The legal code was written in Sardinian and established a whole range of citizens' rights. Among the revolutionary concepts in this Carta de Logu was the right of women to refuse marriage and to own property. In terms of civil
