Commemorated at Memorial Name Lane Cove First World War Roll of Honour Given name J A Family name O'Brien Gender Male Conflicts First World War, 1914–18 Fate Returned to Australia (RTA) Additional information Last held rank Second Lieutenant Unit at embarkation 4 Infantry Battalion Service Australian Army - First Australian Imperial Force (1st AIF) Do you know more about this war Veteran? Click here to learn how you can contribute