Sent to the war in Spain, on 7 September 1808 Carrière was given command of four regiments of light cavalry attached to Marshal Victor's I Corps of the Army of Spain. On 18 September his force was detached to form part of Marshal Bessières' II Corps. On 26 October 1808 he was proclaimed Baron de Beaumont. Returning to Victor's corps on 15 December, he fought at Uclés and at Medellín, where his brigade broke the enemy right and captured 6000 men. He was wounded at Talavera, took 4000 prisoners at Ocaña, and took part in the Siege of Cádiz.