 In 1808, de Faÿ commanded the Armée du Midi Cavalry under Marshal Jean-Baptiste Bessières ("later" Duc d'Istria), Marshal Victor ("later" Duc de Belluno) and Marshal Soult ("later" Duc de Dalmatie "then" Prime Minister) in the Spanish Peninsular War.He served at the Fall of Madrid, and at the battles of Uclés, Cuenca, Medellín, Talavera, Ocana, Gebora, Albuquerque, Albuera, Usagre, Elvas, being wounded at Villafranca; one of his dispatches was intercepted and deciphered by the British.In May 1808, de Faÿ was created a Baron de l'Empire in addition to his ancient family titles