The Australian Services Contingent was the Australian Army contribution to the United Nations Transition Assistance Group (UNTAG) peacekeeping mission to Namibia in 1989 and 1990. Australia sent two contingents of over 300 engineers each to assist the Special Representative of the Secretary General, Martti Ahtisaari, in overseeing free and fair elections in Namibia for a Constituent Assembly in what was the largest deployment of Australian troops since the Vietnam War.