Jean-Baptiste Cyrus de Timbrune de Thiembronne, Comte de Valence (22 September 1757 – 4 February 1822) commanded French troops during the French Revolutionary Wars and the Napoleonic Wars. A nobleman, he joined the French Royal Army as a captain of cavalry in 1778. By the time of the French Revolution he commanded a cavalry regiment. Valence led troops at Valmy in 1792 and was soon appointed to command the Army of the Ardennes. He led the right wing at Neerwinden. Becoming involved in Charles Francois Dumouriez's failed plot to seize control of the army, he defected in April 1793.