The Occupied Enemy Territory Administration (OETA) was a joint British and French military administration over Levantine and Mesopotamian provinces of the former Ottoman Empire between 1918–20, set up following the Sinai and Palestine Campaign of World War I. The administration ended following the assignment of the French Mandate of Syria and Lebanon and British Mandate for Palestine at the 19–26 April 1920 San Remo Conference.
Following British and French occupation, the region was split into three administrative sub-units, which varied very little from the previous Ottoman divisions. OETA South, consisting of the Ottoman sanjaks of Jerusalem, Nablus and Acre, OETA North (later renamed OETA West) consisting of the Ottoman sanjaks of Beirut, Lebanon, Lataqiya and a number of sub-districts, and OETA East consisting of the Ottoman sanjaks of Syria and Hejaz
The commander of OETA South was Field Marshall Edmund Allenby. When Allenby first assumed command of the Egyptian Expeditionary Force he quickly joined the army in the field leaving the political and administrative problems related to the Egyptian Mandate to a Government appointee with a suitable staff. The area of formerly Ottoman territory now under occupation also required management, and with the approval of the Government, Allenby appointed a Chief Administrator for Palestine. He divided the country into four districts: Jerusalem, Jaffa, Majdal and Beersheba, each under a military governor. Under this administration the immediate needs of the people were provided for, seed grain and live–stock were imported and distributed, finance on easy terms was made available through the Army bankers, a stable currency was set up and postal services restored. Allenby insisted that while military administration was required it was to remain his responsibility.
Source: Wikipedia