Battle of Maysalun
Following the mandate given to France in 1920 and the defeat of Syrian forces in May 1920 at the Battle of Maysalun, Syria was divided in two countries, Syria and Lebanon; and both were under French military occupation. Stamps of France overprinted for use in Syria were used between 1919 and 1923 overprinted "T.E.O." (Territoires Ennemis Occupés) or "O.M.F." (Occupation Militaire Francaise).