خوان الأول ملك قشتالة
Under the conditions of peace stipulated that Beatrice of Portugal, the heiress of Ferdinand I of Portugal, married King John I of Castile. This union meant "de facto" annexation of Portugal to the Crown of Castile, but this treaty did not please the Portuguese nobility, and became the main cause of the future important crisis of 1383-1385. On October 22, King Ferdinand died. According to the marriage contract, dowager Queen Leonor Telles de Menezes assumed regency in the name of her daughter Beatrice and son-in-law, John I of Castile. Since diplomatic opposition was no longer possible, the party for independence took more drastic measures, starting the 1383–1385 Crisis.