The Franco-Italian army led by Eugène de Beauharnais was defreated by an Austrian army commanded by a member of what house?
Archduke John of Austria Archduke John of Austria (German: "Erzherzog Johann Baptist Joseph Fabian Sebastian von Österreich" ; 20 January 1782 – 11 May 1859), a member of the House of Habsburg-Lorraine, was an Austrian field marshal and Imperial regent ("Reichsverweser") of the short-lived German Empire during the Revolutions of 1848.
Prince Leopold of Bavaria Leopold Maximilian Joseph Maria Arnulf, Prinz von Bayern (9 February 1846 – 28 September 1930) was born in Munich, the son of Prince Regent Luitpold of Bavaria (1821–1912) and his wife Archduchess Augusta of Austria (1825–1864). He was a Field Marshal ("Generalfeldmarschall") who commanded German and Austro-Hungarian forces on the Eastern Front in World War I.