2021 50c Operation Overlord Battle of Long Khanh PNC2021 marks the 50th anniversary of Operation Overlord. This took place during the Vietnam War in Long Khanh Province on 5 14 June 1971 and was the most intense action for the Australians in 1971. Following the discovery of the communist base camp, more than 2,500 soldiers and airmen from the 1st Australian Task Force (1 ATF), including 3rd Battalion Royal Australian Regiment (3 RAR), 4 RAR and US Army 2 8 Battalion, successfully fought the 3 33 North