Aragonese conquest of Sardinia

The island of Sardinia was at the time subject to the influence of the Republic of Pisa, the Pisan della Gherardesca family, Genoa and of the Genoese families of Doria and the Malaspina; the only native political entity survived was the Judicate of Arborea, allied with the Crown of Aragon.

The financial difficulties due to the wars in Sicily (until 1295), the conflict with the Crown of Castile in the land of Murcia and Alicante (1296–1304) and the failed attempt to conquer Almeria (1309) explain the delay of James II of Aragon in bringing the conquest of Sardinia, enfeoffed to him by Pope Boniface VIII in 1297.

Sardinia was abundant of natural resources like silver and salt and had a thriving agro-pastoral economy; also its geographical location ensured more control over the western Mediterranean and the island itself was an indispensable basis for the creation of so-called ruta de las islas (route of the islands) that allowed to halve the time of sailing to reach the rich markets of the Eastern Mediterranean.

In 1347 the Doria, which controlled most of the lands of the former Logudoro state in north-western Sardinia, came again into conflict with the Crown of Aragon at Aidu de Turdu between Bonorva and Giave.

After the sale of the remaining territories for 100,000 gold florins to the Judicate of Arborea in 1420,[10] the "Kingdom of Sardinia" extended throughout the island, except for the city of Castelsardo (at that time called Casteldoria or Castelgenovese), which had been stolen from the Doria in 1448.

Political situation in Sardinia in the early 14th century, just before the Aragonese invasion:
Red, Republic of Pisa
Yellow, Doria
Black, Comune of Sassari
Green, della Gherardesca gherardiani
Purple, Malaspina
Blue, Judicate of Arborea
Political situation in Sardinia after the surrender of Pisa in June 1326
The Judicate of Arborea, between 1368–1388 and 1392–1409, controlled most of the island.