In the second year of the Great War, the British began to consider the future of the Middle East once the Ottoman Empire had been defeated. The Ottomans were proving to be far more effective fighters than the British had anticipated, but the discovery of oil at Mosul had made the control of the Middle East a priority. Prime Minister David Lloyd George summoned Sir Mark Sykes, a British diplomat and explorer to demonstrate how British and French ambitions in the region could both be accomodated.