The 6th Light Horse Regiment was a mounted infantry regiment of the Australian Army during the First World War. The regiment was raised in September 1914, and assigned to the 2nd Light Horse Brigade. The regiment fought against the forces of the German Empire and the Ottoman Empire, in Egypt, at Gallipoli, on the Sinai Peninsula, and in Palestine and Jordan. After the armistice the regiment eventually returned to Australia in March 1919. For its role in the war the regiment was awarded sixteen battle honours. During the inter-war years, the regiment was re-raised as a part-time unit based in New South Wales, adopting the designation of the "New South Wales Mounted Rifles". It was later converted to a motor regiment during the early years of the Second World War before being redesignated as an armoured car regiment. Nevertheless, it was disbanded in early 1943 without having been deployed overseas. During the post war years, the regiment was re-raised as part of the Citizens Military Force, and in 1956 was converted into an infantry unit, and in 1960 was subsumed into the Royal New South Wales Regiment.

The 2nd Light Horse Brigade was a mounted infantry brigade of the Australian Imperial Force (AIF) which served in the Middle Eastern theatre of World War I. The brigade was initially formed as a part-time militia formation in the early 1900s in New South Wales. In 1914, the brigade was re-constituted as part of the AIF. The brigade first saw action while serving in the Australian and New Zealand Army Corps (ANZAC) during the Gallipoli campaign. After being withdrawn to Egypt in February 1916 they served in the ANZAC Mounted Division from March 1916 as part of the Egyptian Expeditionary Force during the Sinai and Palestine Campaign until the end of the war. After the war, the AIF light horse regiments were demobilised and disbanded; however, the brigade briefly existed as a part-time militia formation in New South Wales until 1921 when its regiments were reorganised into cavalry brigades.