The 1st Royal New South Wales Lancers was an Australian Army light cavalry (reconnaissance) regiment. Its complicated lineage includes the New South Wales Lancers which was first formed as a colonial unit in 1885 as the New South Wales Cavalry, and subsequently saw action in the Second Boer War, and later during First World War at Gallipoli and Palestine as the 1st Light Horse Regiment. The unit subsequently served during the Second World War as the 1st Armoured Regiment equipped with Matilda tanks, fighting the Japanese in New Guinea and Borneo.