The male line of the <a href="https://en.wikipedia.org/wiki/Portuguese_House_of_Burgundy" id="mwJw" rel="mw:WikiLink" title="Portuguese House of Burgundy">Portuguese House of Burgundy</a> becomes extinct with the death of King <a href="https://en.wikipedia.org/wiki/Ferdinand_I_of_Portugal" id="mwKA" rel="mw:WikiLink" title="Ferdinand I of Portugal">Fernando</a>, leaving only his daughter Beatrice. Rival claimants begin a period of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/1383–85_Crisis" id="mwKQ" rel="mw:WikiLink" title="1383–85 Crisis">civil war</a> and disorder.<sup about="#mwt31" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-4"}}' id="cite_ref-4" rel="dc:references" typeof="mw:Extension/ref"><a href="./October_22#cite_note-4" id="mwKg" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwKw">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt28" class="citation book cs1" id="CITEREFE._Michael_Gerli2013">E. Michael Gerli (4 December 2013). <a class="external text" href="https://books.google.com/books?id=euVJAgAAQBAJ&amp;pg=PA332" id="mwByA" rel="mw:ExtLink nofollow"><i id="mwByE">Medieval Iberia: An Encyclopedia</i></a>. Routledge. p.<span id="mwByI" typeof="mw:Entity"> </span>332. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwByM" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwByQ" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-1-136-77162-0" id="mwByU" rel="mw:WikiLink" title="Special:BookSources/978-1-136-77162-0"><bdi id="mwByY">978-1-136-77162-0</bdi></a>.</cite><span about="#mwt28" class="Z3988" id="mwByc" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Medieval+Iberia%3A+An+Encyclopedia&amp;rft.pages=332&amp;rft.pub=Routledge&amp;rft.date=2013-12-04&amp;rft.isbn=978-1-136-77162-0&amp;rft.au=E.+Michael+Gerli&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DeuVJAgAAQBAJ%26pg%3DPA332&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctober+22"></span></span>