During the First World War an Arab Revolt, supported by Britain, succeeded in removing the Ottomans from much of the Middle East; in the period following this Ibn Saud managed to expand his kingdom considerably, eventually proclaiming the Kingdom of Saudi Arabia in 1932. Ibn Saud refused to recognise the Anglo-Ottoman lines and lay claim to large parts of the eastern Arabian hinterland (the so-called ‘Hamza line’).[7]