Operation Bribie (17–18 February 1967), also known as the Battle of Ap My An, was fought during the Vietnam War in Phuoc Tuy province between Australian forces from the 6th Battalion, Royal Australian Regiment (6 RAR) and two companies of Viet Cong from D445 Battalion, likely reinforced by North Vietnamese regulars. During the night of 16 February the Viet Cong attacked a South Vietnamese Regional Force compound at Lang Phuoc Hai, before withdrawing the following morning after heavy fighting with South Vietnamese forces. Two hours later, a Viet Cong company was reported to have formed a tight perimeter in the rainforest 2 kilometres (1.2 mi) north of Lang Phuoc Hai, near the abandoned hamlet of Ap My An. In response, the Australians deployed a quick reaction force. Anticipating that the Vi