The Middle Eastern theatre of World War I (November 2, 1914 - March 15, 1920) fought between mainly the Ottoman Empire of the Central Powers and primarily of the British and the Russians of the Allied Powers with the Arabs who participated in the Arab Revolt, the Armenians initially with Armenian Resistance extending to the Armenian Corps of Democratic Republic of Armenia. This theatre encompassed the largest territory of all the theatres of WWI. It comprised five main campaigns: the Sinai and Palestine Campaign, the Mesopotamian Campaign, the Caucasus Campaign, the Persian Campaign and the Gallipoli Campaign. There were also minor operations of Arabia and Southern Arabia Campaign, and Aden Campaign. Besides the regular forces both sides used the asymmetrical forces in the region. The thea