May. Finally, on 16 October Australian forces handed over control of the base at Nui Dat to South Vietnamese forces, while 4 RAR, the last Australian infantry battalion in South Vietnam, sailed for Australia onboard on 9 December 1971. V Company and the New Zealand medical team were also withdrawn at this time. Meanwhile, D Company, 4 RAR with an assault pioneer and mortar section and a detachment of APCs remained in Vung Tau protect the task force headquarters and 1 ALSG until the final withdrawal of stores and equipment could be completed, finally returning to Australia on 12 March 1972. Although 1 ATF had been able to dominate its area of operations and successfully reduced the PAVN/VC's ability to "influence and coerce" the population of the province, while affording the South Vietnamese government some degree of control, this did not last following their withdrawal, and PAVN/VC forces began to move back into Phuoc Tuy following their departure. Ultimately, despite maintaining a reputation for professionalism, the operations of the task force had little impact on the outcome of the war. Between June 1966 and December 1971, 1 ATF recorded at least 3,370 PAVN/VC killed, the majority in Phuoc Tuy, while an unknown number were wounded. Total Australian Army casualties during the Vietnam War were 478 killed and 3,025 wounded, the bulk of which were sustained by 1 ATF. New Zealand casualties during the war were 37 killed and 187 wounded, the majority of which while serving in 1 ATF. Order of battle 1 ATF's organisation varied as Australian and New Zealand units rotated through South Vietnam and the total size of the Australian and New Zealand force in South Vietnam changed. The task force typically consisted of: Headquarters Company 1 ATF; Two or three infantry battalions; One field artillery regiment (with one New Zealand field battery and a US medium artillery battery attached); One field squadron (engineers): 1 Field Squadron; One engineer support troop: 21 Engineer Support Troop; One construction engineer squadron: 17th Construction Squadron; One APC Squadron (M-113); One Armoured Squadron (Centurion tanks); One Australian SAS Squadron; One Signals Squadron; 1st Australian Task Force Logistics Company; and 161 Reconnaissance Flight (Bell Sioux Light Observation Helicopters, Cessna 180s, a Cessna Bird Dog and a Pilatus PC-6 Porter) New Zealand forces attached to 1 ATF included: One to two rifle companies (W and V Company, Royal New Zealand Infantry Regiment); One