The War of the Union (1347-48) is a conflict period in the crown of Aragon that kept on the one hand the troops of the faithful to the king Pedro the Ceremonious one and, on the other, the coalition with the name of Union of Aragon and Union of Valencia, formed by some nobles and the popular arm of the cities and towns that adhered to the lordly movement in those kingdoms. Catalonia remained faithful to the king. Hostilities began in 1347 in the Kingdom of Valencia, where there was an uproar against the king, headed by the city of Valencia and followed by a good part of the towns and villages of the kingdom except for the cities of Burriana and Xàtiva, (1349) and the title of town (1347), respectively.

The popular classes, after a series of bad harvests, protested against the authoritarianism of Pedro the Ceremonious one and its fiscal charge, that was intended to finance its external conquests. In the Kingdom of Aragon, the beautiful metallic hostility began to beginning of 1348, with the Battle of Mislata, with the victory of the king. This abolished, on October 14, 1348, the privileges of the Union, concessions granted by King Alfonso II to the Aragonese and Valencian nobility dating from 1288. The king explains in his chronicle the reasons why he tried, with more benevolence than he thought, the city, which sought to burn and fill it with salt for its rebellion, as quoted in the text: You see that, because of the great rebellion that the people of the city have done in feta, it is a fact that the city has been cremated and destroyed and plowed with salt, in such a way that no person is not inhabited. (it is true that we, because of the great rebellion made by the people of the city, we understood that the city was burned and destroyed and plowed with salt, for which no one will ever live).

wiki