Australian Naval History on 21 August 1968

LEUT A. A. Casadio, RAN, and PO O. C. Phillips of the RAN Helicopter Flight Vietnam, were killed when their helicopter gunship crashed six miles from their base at Black Horse. The helicopter, flying at tree top level, was engaged by enemy troops equipped with Rocket Propelled Grenades (RPGs) and was hit by one of these deadly projectiles and exploded in flames before crashing through trees and exploding. Lieutenant Dalgleish, RAN, landed his helicopter quickly in an attempt to rescue the crew, but all had been killed, and the exploding ammunition stopped attempts to extinguish the fire. Also lost was WO Hershel Bullock (USA) and Specialist 4 William Fennell (USA)