In Italy, he led one of six armies under the command of Napoleon's adopted son Eugène de Beauharnais. At Lobau, as a member of the Grande Armée under Napoleon, he took part in the Battle of Wagram, during which he had four horses shot from under him. In 1810, he was created a baron of the French Empire. Thereafter he was transferred to Spain to support Joseph Bonaparte who had been made king of Spain by his brother, but who was slowly forced to retreat by the rebellious Spanish and the British under Wellington.