regiment of Spanish troops
...that a regiment of Spanish troops served in the French Army from 1809 to 1813, despite France and Spain being at war with each other in the Iberian Peninsula?
...that a <b id="mwD3o"><a href="./Joseph_Napoleon's_Regiment_(France)" id="mwD3s" rel="mw:WikiLink" title="Joseph Napoleon's Regiment (France)">regiment of Spanish troops</a></b> served in the <a class="mw-redirect" href="./La_Grande_Armée" id="mwD3w" rel="mw:WikiLink" title="La Grande Armée">French Army</a> from 1809 to 1813, despite <a href="./France" id="mwD30" rel="mw:WikiLink" title="France">France</a> and <a href="./Spain" id="mwD34" rel="mw:WikiLink" title="Spain">Spain</a> being <a href="./Peninsular_War" id="mwD38" rel="mw:WikiLink" title="Peninsular War">at war with each other</a> in the <a href="./Iberian_Peninsula" id="mwD4A" rel="mw:WikiLink" title="Iberian Peninsula">Iberian Peninsula</a>?