<a href="https://en.wikipedia.org/wiki/Peninsular_War" id="mwXg" rel="mw:WikiLink" title="Peninsular War">Peninsular War</a>: The allies Spain, Portugal and United Kingdom fight an inconclusive battle against the French at the <a href="https://en.wikipedia.org/wiki/Battle_of_Albuera" id="mwXw" rel="mw:WikiLink" title="Battle of Albuera">Albuera</a>.<sup about="#mwt41" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"Esdaile340"},"body":{"id":"mw-reference-text-cite_note-Esdaile340-6"}}' id="cite_ref-Esdaile340_6-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./May_16#cite_note-Esdaile340-6" id="mwYA" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwYQ">[6]</span></a></sup> It is, in proportion to the numbers involved, the bloodiest battle of the war.<sup about="#mwt45" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"Oman393"},"body":{"id":"mw-reference-text-cite_note-Oman393-7"}}' id="cite_ref-Oman393_7-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./May_16#cite_note-Oman393-7" id="mwYg" style="counter-reset: mw-Ref 7;"><span class="mw-reflink-text" id="mwYw">[7]</span></a></sup>