The Ottoman Empire, of which Palestine was a part, broke up shortly after the First World War and was officially dissolved in 1923 by the Treaty of Lausanne. In the early years of the First World War, there were several important Ottoman victories against the British Empire, such as the Gallipoli Campaign and the Siege of Kut. Palestine was previously a part of the Ottoman Empire. Britain had declared its intention to support the creation of a Jewish homeland in the Balfour Declaration, 1917. The British had, in the Hussein-McMahon Correspondence, previously been in discussions with the Hashemite family concerning the concept of an independent Arab state. These discussions remained inconclusive and vague but contained the implied support from Britain of an independent Arab state in exchange for a successful Arab Revolt during World War I. The British, under General Allenby during the Arab Revolt under the guidance of British intelligence officers, the most famous being T. E. Lawrence, contributed to the defeat of the Ottoman forces in 1917 in which British and French forces occupied the Sinai and the majority of Greater Syria. The land was administered by the British for the remainder of the war.