commanded by Chetwode consisting of the 53rd (Welsh) Division commanded by Major General Dallas, Anzac Mounted Division commanded by Chauvel now made up of 1st and 2nd Light Horse, New Zealand Mounted Rifles and 22nd Mounted Yeomanry Brigades and the Imperial Mounted Division commanded by Hodgson now made up of the 3rd and 4th Light Horse with the 5th and 6th Mounted Brigades and two Light Car Patrols. The 3rd Light Horse Brigade rather resented the change, as they lost the connection with their service on Gallipoli via the old name of Anzac. The Imperial Mounted Division moved up from Ferry Post to join Desert Column at el Burj just past El Arish on the road to Gaza between 28 February and 9 March; the 3rd Light Horse Brigade coming under their orders on 2 March and the Imperial Mounted Division coming under orders of Desert Column on 10 March 1917. The 4th Light Horse Brigade, in the process of formation at Ferry Post, planned to leave on 18 March. Transport was also reorganised; the horse drawn supply columns were combined with the camel trains so that Eastern Force could operate for about twenty four hours beyond railhead. This was a vast undertaking; one brigade (and there were six) of Light Horse at war establishment consisted of approximately 2,000 soldiers as well as a division of infantry; all requiring sustenance. Ottoman Army units During February British intelligence reported the arrival in the region, of two divisions of the Ottoman Army; the 3rd Cavalry Division (from the Caucasus) and the 16th Infantry Division (from Thrace). They joined three infantry divisions in the area; along the long Gaza–Beersheba line, the Fourth Army had about eighteen thousand soldiers. Kress von Kressenstein allocated some troops to both Gaza and Beersheba, but held the majority in reserve at Tell esh Sheria and Jemmameh and by mid March the Ottoman Army's 53rd Infantry Division was on its way south from Jaffa to augment these troops. The garrison at Gaza consisting of seven battalions could muster 3,500 rifles, machine gun companies and five batteries of 20 guns, supported by a squadron of newly arrived German Halberstadt fighter aircraft, which outclassed Allied aircraft and gave the Ottoman Army local air mastery. It was believed the Ottoman Army had 7,000 rifles supported by heavy field and machine guns with reserves close by at Gaza and Tel el Sheria. Between