maintained on the Sinai peninsula on a line between El Arish and Nekhl, with forces at Gaza and Beersheba. During the next few months Kress von Kressenstein commanded mobile units and launched a series of raids and attacks in an attempt to disrupt traffic on the Suez Canal. Colonel Kress von Kressenstein did all he could to keep the British occupied, launching an attack on 8 April 1915 when a mine was placed in the Suez Canal, which was located and disabled by a patrol, and between 5 and 13 May 1915 he personally led a charge. During the Gallipoli campaign these tactics were abandoned. Von Kressenstein also demanded German special forces, which were promised to arrive in February 1916, to prepare another expedition against the Canal. He moved to the headquarters of the Fourth Army in Ain Sofar in August, then to the new headquarters in Jerusalem, and waited for the German specialists. However, the Ottoman line of communication was extended towards Egypt, with the completion of the section of the Ottoman railway to Beersheba, which was opened on 17 October 1915. British defences extended Von Kressenstein's raids confirmed the impracticality, identified by Lord Kitchener, Secretary of State for War, in November 1914, of defending the Suez Canal from the western side. Near the end of 1915, with the Gallipoli campaign drawing to an end, Cabinet authorised new positions to be established in the desert about east of the Canal, strengthening defence of the canal against long range guns, and agreed to provide additional troops. Port Said became headquarters of these new defences, with an advanced headquarters at Kantara. The defences were organised into three sectors: No. 1 (Southern): Suez to Kabrit HQ Suez – IX Corps No. 2 (Central): Kabrit to Ferdan HQ Ismailia – I ANZAC Corps (Australian and New Zealand Army Corps) No. 3 (Northern): Ferdan to Port Said – XV Corps At the end of 1915 General Sir John Maxwell, with headquarters at Cairo, had responsibility for troops in the Egyptian Delta, the Western Desert and the Sudan and administered martial law over the whole region including the Suez Canal. The British War Office controlled the Levant Base which was responsible for administering British Empire forces in Salonika, Gallipoli, Mesopotamia and India, and had its headquarters at Alexandria. The retreating forces on Gallipoli and divisions from the United Kingdom formed the Mediterranean Expeditionary Force commanded