The Occupied Enemy Territory Administration was a joint British, French and Arab military administration over Levantine provinces of the former Ottoman Empire between 1917 and 1920, set up on 23 October 1917 following the Sinai and Palestine Campaign and Arab Revolt of World War I. Although it was declared by the British military, who were in control of the region, it was followed on 30 September 1918 by the 1918 Anglo-French Modus Vivendi in which it was agreed that the British would give the French control in certain areas, and the Hashemites were given joint control of the Eastern area per T.E. Lawrence's November 1918 "Sharifian plan". Wikipedia