Adopted son of Napoleon Bonaparte (1781–1824), the natural son of Napoleon’s wife, Josephine, and Alexandre, Vicomte de Beauharnais, who had been executed during the Reign of Terror. Eugène proved to be an able military leader and, in addition to serving as Napoeon’s aide-de-camp, led several campaigns in Italy and Russia. LS in French, one page, 7.25 x 4, March 18, 1809. An untranslated letter on a military matter. Matted and framed with a portrait engraving to an overall size of 14.25 x 23.25. In fine, clean condition. R&R COA.