Following the successful campaigns during the <a href="https://en.wikipedia.org/wiki/Ottoman_Interregnum" id="mwGg" rel="mw:WikiLink" title="Ottoman Interregnum">Ottoman Interregnum</a>, <a href="https://en.wikipedia.org/wiki/Musa_Çelebi" id="mwGw" rel="mw:WikiLink" title="Musa Çelebi">Musa Çelebi</a>, one of the sons of <a href="https://en.wikipedia.org/wiki/Bayezid_I" id="mwHA" rel="mw:WikiLink" title="Bayezid I">Bayezid I</a>, becomes <a href="https://en.wikipedia.org/wiki/Sultan" id="mwHQ" rel="mw:WikiLink" title="Sultan">Sultan</a> of the <a href="https://en.wikipedia.org/wiki/Ottoman_Empire" id="mwHg" rel="mw:WikiLink" title="Ottoman Empire">Ottoman Empire</a> with the support of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Mircea_I_of_Wallachia" id="mwHw" rel="mw:WikiLink" title="Mircea I of Wallachia">Mircea I of Wallachia</a>.<sup about="#mwt20" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-2"}}' id="cite_ref-2" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_17#cite_note-2" id="mwIA" style="counter-reset: mw-Ref 2;"><span class="mw-reflink-text" id="mwIQ">[2]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-2"><cite about="#mwt17" class="citation book cs1" id="mwBks"><a class="external text" href="https://books.google.com/books?id=akFJAQAAMAAJ" id="mwBkw" rel="mw:ExtLink nofollow"><i id="mwBk0">The Encyclopaedia of Islām: A Dictionary of the Geography, Ethnography and Biography of the Muhammadan Peoples</i></a>. <a class="mw-redirect" href="./E._J._Brill" id="mwBk4" rel="mw:WikiLink" title="E. J. Brill">E. J. Brill</a>. 1934. p.<span id="mwBk8" typeof="mw:Entity"> </span>535. <a class="external text" href="https://web.archive.org/web/20200610111848/https://books.google.com/books?id=akFJAQAAMAAJ" id="mwBlA" rel="mw:ExtLink nofollow">Archived</a> from the original on 2020-06-10<span class="reference-accessdate" id="mwBlE">. Retrieved <span class="nowrap" id="mwBlI">2020-02-06</span></span>.</cite><span about="#mwt17" class="Z3988" id="mwBlM" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Encyclopaedia+of+Isl%C4%81m%3A+A+Dictionary+of+the+Geography%2C+Ethnography+and+Biography+of+the+Muhammadan+Peoples&amp;rft.pages=535&amp;rft.pub=E.+J.+Brill&amp;rft.date=1934&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DakFJAQAAMAAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+17"></span></span>