Rubuta ci gaba don wannan sakin layi - Rikicin maye gurbin Fotigal na 1580 () ya faru ne sakamakon mutuwar saurayi Sarki Sebastian I na Fotigal a yakin Alcácer Quibir
a shekara ta 1578 da magajinsa kuma babban kawunsa Henry I a 1580. Kamar yadda Sebastian da Henry ba su da magada kai tsaye, waɗannan abubuwan da suka faru sun haifar da rikicin daular, tare da yaƙe-yaƙe na ciki da na waje tsakanin masu neman kujerar mulkin Fotigal; Bugu da ƙari, saboda ba a taɓa samun gawar Sebastian ba, wasu masu yaudara da yawa sun bayyana a cikin shekaru da yawa masu zuwa suna da'awar su zama saurayi sarki, suna ƙara rikitar da yanayin. A ƙarshe, Philip II na Spain ya sami ikon mallakar ƙasar, ya haɗa da Portuguese da Spanish Crowns a cikin Iberian Union, ƙungiyar mutum da za ta ɗauki shekaru sittin, a lokacin da Daular Fotigal ta ƙi, ana ƙalubalantar ta a duniya a lokacin Yakin Holland-Portuguese.