Rubuta ci gaba don wannan sakin layi - A kan mutuwar ba tare da magada namiji na ɗan'uwansa ba, Sarki Ferdinand I, a watan Oktoba 1383, an yi ƙoƙari sosai don tabbatar da gadon sarauta ga Beatrice, 'yar Ferdinand kawai. A matsayin magaji, Beatrice ya auri sarki John I na Castile, amma ra'ayin jama'a ya saba da wani shiri wanda Castile zai haɗa Portugal da shi. 1383<unk>1385 Tsarin mulkin Portugal
Bayan haka, wani lokaci na rikice-rikicen siyasa, lokacin da babu sarki ya mallaki kasar.