The Twelfth Army was a British Army formation during the Second World War. The Twelfth Army denotation was actually used twice; firstly, in 1943, for a fictional formation and secondly, in 1945, in Burma. The Twelfth Army moniker was originally used by 'A' Force, a Cairo-based deception department created by Dudley Clarke, for a formation used in Operation Barclay and Operation Zeppelin. It was later used for a real formation in Burma, which took over operations from the Fourteenth Army and would later become Burma Command.