sheer size alone making it hard to control. There was no road from Cairo, while only one railway track crossed the of desert from Cairo to Ismaïlia on the canal before branching north to Port Said and south to Suez. Control of the central area around Ismaïlia was of great strategic importance because these three canal towns relied on fresh water from the Nile via the Sweet Water Canal to the main gates and sluices near there. At the beginning of hostilities between Britain and the Ottoman Empire in November 1914, the 30,000-strong British defence force evacuated the part of the Sinai Peninsula that was east of the canal, concentrating their defences on the western side of the canal. The British force comprised the 10th, and 11th Indian Divisions, the Imperial Service Cavalry Brigade, the Bikaner Camel Corps, three batteries of Indian mountain artillery and one Egyptian artillery battery. These were supported by the guns of Allied ships in the canal. Opposing them were around 25,000 men, including the 25th Division. The Ottoman Empire demonstrated its interest in being reinstated in Egypt in 1915 when Ottoman forces attacked British forces in Egypt. The Germans also helped to foment unrest among the Senussi in what is now Libya, when they attacked western Egypt and threatened the Sudan during the Senussi campaign. Egypt's contribution to the war effort Egypt was neither an independent ally nor a member of the British Empire and as such held a unique position amongst the belligerents. The recently appointed High Commissioner Sir Reginald Wingate and Murray agreed that Egypt's contributions would be restricted to the use of the country's railway and Egyptian personnel. However, Maxwell had proclaimed on 6 November 1914 that Egypt would not be required to aid Britain's war effort. Martial law allowed the British administration to control foreign European residents, monitor foreign agents and intern dangerous persons who were the subjects of hostile nations. The powers were also used to police prostitution and the sale of alcohol. The Capitulations, however provided some protection to the Europeans who controlled both these industries. In the autumn of 1917 GHQ was transferred from Cairo to the front leaving garrison battalions. This move took the commander in chief of the EEF, who was responsible for martial law, out of touch with the civil authorities, and unrest in Egypt became serious during the winter of 1917/18. By 1917, 15,000