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.
John Swayne Lieutenant-General Sir John George des Reaux Swayne KCB CBE (3 July 1890 – 16 December 1964) was a senior British Army officer who became General Officer Commanding South-East Command.