The account in the memoirs claims that Marie-Thérèse sought to return to active duty from 1809, borne out by the tone of letters of recommendation from Generals François Jean Baptiste Quesnel and Marie-François Auguste de Caffarelli du Falga, apparently dating to 1811; was pleased to recruit her into a new infantry regiment of the Imperial Guard, who formed the garrison at Burgos in the Spanish campaign. At Burgos, however, she fell into the hands of the Spanish guerrillas of the "cura" Merino and was taken as a prisoner of war to England.