To answer where were they deployed, thats a big task, many units served in several theatres, including home service in Australia. I will elaborate on a couple of the more famous LH units, firstly 10th Light Horse from my home state of Western Australia. Best way to see their service history and deployment is the Battle Honours: 10th Light Horse ; South Africa 1900-1902 Sari Bair, Magdhabarafah Jerusalem, Meggido Defence of Anzac (Gallipoli), Romani Gaza - Beersheba, Jordon (Es Salt), Damascus, Sharon. Mostly Middle East. 9th Light Horse ; SOUTH AFRICA, 1899-1902 ,DEFENCE OF ANZAC, SARI BAIR, GALLIPOLI, 1915, ROMANI MAGDHABA-RAFAH, GAZA-BEERSHEBA , JERUSALEM, JORDAN (ES SALT), MEGGIDO, SHARON, DAMASCUS . The record of the 4th Light Horse in the 1914-18 war is without equal in the AIF. It was the only Australian unit to see service on all three fronts, France, Gallipoli and Palestine and was granted a total of 24 Battle Honours of which only 10 can be carried on the guidon. Probably the most notable action of the 4th Light Horse was the Charge at Beersheba on 30 October, 1917. 3rd Light Horse ; SOUTH AFRICA, 1899-1902 ,DEFENCE OF ANZAC, SARI BAIR, GALLIPOLI, 1915, ROMANI MAGDHABA-RAFAH, GAZA-BEERSHEBA , JERUSALEM, JAFFA, JERICHO, JORDAN (AMMAN) The two Light Horse regiments which served in France and Belgium - the 4th and 13th - are often forgotten; because they rarely fought as complete units and also because they sometimes worked in support of British, French and Canadian troops. Once again, i hope this helps. Steve