Whakaotihia te rerenga e whai ake nei: I te matenga o tana tuakana, o Kingi Ferdinand I, i te Oketopa 1383, i te mea kahore he uri tane, he nui nga mahi i mahia kia whai mana ai a Beatrice, te tamahine kotahi a Ferdinand. I te mea ko ia te rangatira, kua marenatia a Beatrice ki te kingi a John I o Castile, engari ko te whakaaro o te iwi i te whakatikatika i a Portugal i whakauruhia e Castile. Ko te
1383<unk>1385 I whai ake te interregnum Potukara, he wa o te koretake o nga mahi torangapu, i te wa kaore he rangatira i whakahaere i te whenua.