1st Armoured Regiment is an armoured regiment of the Australian Army and is the senior regiment of the Royal Australian Armoured Corps. Formed as a tank unit in the new Australian Regular Army on 7 July 1949, the regiment subsequently saw service during the Vietnam War operating Centurion tanks. Currently the unit is based in Edinburgh, South Australia as part of the 1st Brigade. As part of the Plan Beersheba reorganisation, the unit has become one of three Armoured Cavalry Regiments (ACRs) assigned to the Army's multirole combat brigades in Brisbane, Darwin and Townsville. Each ACR is equipped with M1A1 tanks and ASLAV light armoured vehicles.