ON THIS DAY: Fire Support Base Coral was attacked by North Vietnamese forces on 13 May 1968, marking the start of the Battle of Coral-Balmoral, which was to be Australia's costliest and most protracted battle of the Vietnam War – and a significant victory. FSBs Coral and Balmoral sat astride a route used by North Vietnamese and Viet Cong forces approaching or departing Saigon and nearby Bien Hoa, and comprised defended positions for artillery, mortars and armoured vehicles which in turn supporte