Who was the commanding  Lieutenant General of ARCENT?
XX Corps (United States) The XX Corps of the United States Army fought from northern France to Austria in World War II. Constituted on 10 October 1943 by re-designating the IV Armored Corps of the Army Ground Forces, a training organization which had been activated at Camp Young, California on 5 September 1942, XX Corps became operational in France as part of Lieutenant General George S. Patton's U.S. Third Army on 1 August 1944.
Antoine Louis Popon de Maucune Antoine Louis Popon de Maucune (21 February 1772 – 18 February 1824) led a French division against the British in 1811–1813 during the Peninsular War. He is referred to as Maucune in English-language sources. He joined the pioneer corps of the French army in 1786 and was a lieutenant by the time the French Revolutionary Wars broke out. He fought in the north in 1792 and in the Alps in 1793. Afterward he served in Italy through 1801. During this period, he fought at Arcole in 1796 and at the Trebbia, Novi and Genola in 1799. He was appointed to command the 39th Line Infantry Demi-Brigade and led it in the 1800 campaign.