During the First World War an Arab Revolt, supported by Britain, succeeded in removing the Ottomans from most of the Middle East. As a result of the secret 1916 Anglo-French Sykes-Picot Agreement Britain gained control of the Ottoman Vilayets of Mosul, Baghdad and Basra, which it organised into the mandate of Iraq in 1920. In the meantime Ibn Saud had managed to expand his domains considerably, eventually proclaiming the Kingdom of Saudi Arabia in 1932.