2021 50c ANDA Sydney Battle of Nui Le 50 Years PNC2021 Australasian Numismatic Dealers Association Sydney Money Show Special Release. Operation Ivanhoe was launched on 19 September 1971. Intelligence reports indicated that the infamous 33rd Regiment of the North Vietnamese Army (NVA) was moving into the northern part of Phuoc Tuy Province. On 21 September 1971, just weeks away from going home, soldiers of B and D Companies, 4RAR NZ (ANZAC) Battalion, became involved in heavy fighting against the 33rd