At the beginning of the 20th century what are now Lebanon and Syria belonged to the Ottoman Empire, with the Mount Lebanon semi-autonomous as the Mount Lebanon Mutasarrifate. During the First World War an Arab Revolt, supported by Britain, succeeded in removing the Ottomans from most of the Middle East. However as a result of the secret 1916 Anglo-French Sykes-Picot Agreement Britain and France split the Ottoman domains between them, with Syria and Lebanon falling under a French mandate.