 Complete the following phrase:  The 12th Light Horse Regiment was a mounted unit of the Australian Army. It was raised in New South Wales in 1915 as part of the Australian Imperial Force AIF for service during the First World War. After fighting at Gallipoli as reinforcements, the regiment served in the Sinai and Palestine campaign against the Ottoman Empire, seeing action in several notable battles including Beersheba, the capture of Jerusalem, Megiddo and the capture of Damascus. In the aftermath of the war, the regiment was used to suppress the 