During the <a href="https://en.wikipedia.org/wiki/French_Wars_of_Religion" id="mwNg" rel="mw:WikiLink" title="French Wars of Religion">French Wars of Religion</a>, <a href="https://en.wikipedia.org/wiki/Henry_IV_of_France" id="mwNw" rel="mw:WikiLink" title="Henry IV of France">Henry IV of France</a> declares war on Spain.<sup about="#mwt40" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-6"}}' id="cite_ref-6" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_17#cite_note-6" id="mwOA" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwOQ">[6]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-6"><cite about="#mwt37" class="citation book cs1" id="CITEREFLesaffer2017">Lesaffer, Randall (2017). "Between Faith and Empire: The Justification of the Spanish Intervention in the French Wars of Religion in the 1590s". In Koskenniemi, Martti; Rech, Walter; Fonseca, Manuel Jiménez (eds.). <a class="external text" href="https://books.google.com/books?id=HGfODQAAQBAJ" id="mwCFo" rel="mw:ExtLink nofollow"><i id="mwCFs">International Law and Empire: Historical Explorations</i></a>. Oxford, UK: Oxford University Press. p.<span id="mwCFw" typeof="mw:Entity"> </span>101. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwCF0" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwCF4" typeof="mw:Entity"> </span><a href="./Special:BookSources/9780198795575" id="mwCF8" rel="mw:WikiLink" title="Special:BookSources/9780198795575"><bdi id="mwCGA">9780198795575</bdi></a>.</cite><span about="#mwt37" class="Z3988" id="mwCGE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Between+Faith+and+Empire%3A+The+Justification+of+the+Spanish+Intervention+in+the+French+Wars+of+Religion+in+the+1590s&amp;rft.btitle=International+Law+and+Empire%3A+Historical+Explorations&amp;rft.place=Oxford%2C+UK&amp;rft.pages=101&amp;rft.pub=Oxford+University+Press&amp;rft.date=2017&amp;rft.isbn=9780198795575&amp;rft.aulast=Lesaffer&amp;rft.aufirst=Randall&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DHGfODQAAQBAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+17"></span></span>