 After the Gallipoli Campaign , Australian troops returned to Egypt and the AIF underwent a major expansion , which involved the raising of another three infantry divisions — the 3rd , 4th and 5th — and the establishment of the Anzac Mounted Division . In March 1916 , the infantry began to move to France while the cavalry units stayed in the area and fought Turkish troops and the Senussi Arab tribes that were threatening British control of Egypt . Mounted troops were particularly important in the defence of Egypt and Australian troops of the Anzac Mounted Division saw action in all the major battles of the campaign , first seeing combat in the Battle of Romani . Apart from the horsemen , the mounted troops included the 1st Imperial Camel Corps Brigade . This was organised as a mounted infantry brigade . Of its four battalions , the 1st and 3rd were composed of Australians , the 2nd was British , and the 4th was half Australian and half New Zealand . The cameliers participated in most of the fighting in Egypt and Palestine until the brigade was disbanded in July 1918 . The Australian and New Zealand components then traded their camels for horses and became the 5th Light Horse Brigade . 
