At 0005 on 16 July 1965, No 4 Gun of 161 Battery fired its first round into War Zone D, under the watchful eye of General Williamson, the Commanding General of 173rd Airborne and the Battery Commander Major Don Kenning.  Exactly 50 years later, 130 veterans of 161 Battery  (South Vietnam) gathered in Palmerston North to commemorate the occasion.